diff --git a/.cell/cell.toml b/.cell/cell.toml
index b4abda85..e1581d24 100644
--- a/.cell/cell.toml
+++ b/.cell/cell.toml
@@ -2,7 +2,20 @@
 extramath = "https://gitea.pockle.world/john/extramath@master"
 
 [system]
-ar_timer = 60 # seconds before idle actor reclamation
-actor_memory = 0 # MB of memory an actor can use; 0 for unbounded
-net_service = 0.1 # seconds per net service pull
-reply_timeout = 60 # seconds to hold callback for reply messages; 0 for unbounded
\ No newline at end of file
+# seconds before idle actor reclamation
+ar_timer = 60
+
+# MB of memory an actor can use; 0 for unbounded
+actor_memory = 0 
+
+# seconds per net service pull
+net_service = 0.1 
+
+# seconds to hold callback for reply messages; 0 for unbounded
+reply_timeout = 60 
+
+# max number of simultaneous actors
+actor_max = 10_000
+
+# MB of memory each actor's stack can grow to
+stack_max = 0
diff --git a/prosperon/_sdl_video.ce b/prosperon/_sdl_video.ce
index 4701d3b0..6738667b 100644
--- a/prosperon/_sdl_video.ce
+++ b/prosperon/_sdl_video.ce
@@ -1,6 +1,5 @@
 // SDL Video Actor
 // This actor runs on the main thread and handles all SDL video operations
-log.console("TO HERE")
 var surface = use('surface')
 
 // Default window configuration - documents all available window options
diff --git a/prosperon/main.ce b/prosperon/main.ce
index 4634af24..2ab6aebf 100644
--- a/prosperon/main.ce
+++ b/prosperon/main.ce
@@ -73,8 +73,6 @@ var camera = {
 }
 
 var util = use('util')
-log.console(util)
-log.console(camera)
 var cammy = util.camera_globals(camera)
 
 var graphics
diff --git a/scripts/engine.cm b/scripts/engine.cm
index 6c39fe38..f3781a8e 100644
--- a/scripts/engine.cm
+++ b/scripts/engine.cm
@@ -627,7 +627,13 @@ function turn(msg)
   send_messages()
 }
 
-actor_mod.register_actor(cell.id, turn, cell.args.main, config.system)
+actor_mod.register_actor(cell.id, turn, cell.args.main, config.system.ar_timer)
+
+if (config.system.actor_memory)
+  js.mem_limit(config.system.actor_memory)
+  
+if (config.system.stack_max)
+  js.max_stacksize(config.system.stack_max);
 
 overling = cell.args.overling
 root = cell.args.root
@@ -773,8 +779,6 @@ var val = js.eval(cell.args.program, prog_script)($_, cell.args.arg)
 if (val)
   throw new Error('Program must not return anything');
   
-log.console("WAYDOWN")
-  
 send_messages()
 
 })()
\ No newline at end of file
diff --git a/source/cell.c b/source/cell.c
index 4189ac0a..c19e51a8 100644
--- a/source/cell.c
+++ b/source/cell.c
@@ -105,7 +105,6 @@ void actor_free(cell_rt *actor)
 
   JSContext *js = actor->context;
   
-  JS_FreeValue(js, actor->cycle_fn);
   JS_FreeValue(js, actor->idx_buffer);
   JS_FreeValue(js, actor->message_handle);
   JS_FreeValue(js, actor->on_exception);
@@ -181,7 +180,6 @@ void js_dofree(JSRuntime *rt, void *opaque, void *ptr)
   js_free_rt(rt, ptr);
 }
 
-SDL_ThreadID main_thread = 0;
 SDL_TLSID prosperon_id;
 
 #ifdef TRACY_ENABLE
@@ -329,7 +327,6 @@ cell_rt *create_actor(void *wota, void (*hook)(JSContext*))
 {
   cell_rt *actor = calloc(sizeof(*actor), 1);
   actor->init_wota = wota;
-  actor->cycle_fn = JS_UNDEFINED;
   actor->idx_buffer = JS_UNDEFINED;
   actor->message_handle = JS_UNDEFINED;
   actor->unneeded = JS_UNDEFINED;
@@ -365,7 +362,7 @@ cell_rt *get_actor(char *id)
   return actor;
 }
 
-const char *register_actor(const char *id, cell_rt *actor, int mainthread, JSValue config)
+const char *register_actor(const char *id, cell_rt *actor, int mainthread, double ar)
 {
   SDL_LockMutex(actors_mutex);
   if (shgeti(actors, id) != -1) {
@@ -374,6 +371,7 @@ const char *register_actor(const char *id, cell_rt *actor, int mainthread, JSVal
   }
   actor->main_thread_only = mainthread;
   actor->id = strdup(id);
+  actor->ar_secs = ar;
   shput(actors, id, actor);
   SDL_UnlockMutex(actors_mutex);
   return NULL;
@@ -446,14 +444,9 @@ void set_actor_state(cell_rt *actor)
   }
 
   END:
-  if (actor->state == ACTOR_IDLE && !actor->ar && !has_upcoming) {
-    if (JS_IsUndefined(actor->unneeded))
-      actor->ar = SDL_AddTimerNS(SDL_SECONDS_TO_NS(5), actor_remove_cb, actor);
-    else {
-      if (!isinf(actor->unneeded_secs))
-        actor->ar = SDL_AddTimerNS(SDL_SECONDS_TO_NS(actor->unneeded_secs), actor_remove_cb, actor);
-    }
-  }
+  if (actor->state == ACTOR_IDLE && !actor->ar && !has_upcoming)
+    actor->ar = SDL_AddTimerNS(SDL_SECONDS_TO_NS(actor->ar_secs), actor_remove_cb, actor);
+
   SDL_UnlockMutex(actor->msg_mutex);
 }
 
@@ -1517,7 +1510,6 @@ int main(int argc, char **argv)
   tracy_profiling_enabled = profile_enabled;
 #endif
 
-  main_thread = SDL_GetCurrentThreadID();
   int cores = SDL_GetNumLogicalCPUCores();
 
   prosperon = argv[0];
diff --git a/source/cell.h b/source/cell.h
index 6503188e..038c9e14 100644
--- a/source/cell.h
+++ b/source/cell.h
@@ -4,6 +4,8 @@
 #include <SDL3/SDL.h>
 #include "quickjs.h"
 #include "qjs_macros.h"
+#include "qjs_blob.h"
+#include "blob.h"
 
 #define STATE_VECTOR_LENGTH 624
 #define STATE_VECTOR_M      397
@@ -31,12 +33,10 @@ typedef struct {
 
 typedef struct cell_rt {
   JSContext *context;
-  JSValue cycle_fn;
   JSValue idx_buffer;
   JSValue on_exception;
   JSValue message_handle;
-  JSValue unneeded;
-  
+
   void *init_wota;
 
   ModuleEntry *module_registry;
@@ -49,8 +49,7 @@ typedef struct cell_rt {
 
   char *id;
   MTRand mrand;
-  double unneeded_secs;
-  double ar_secs;
+
   int idx_count;
 
   /* The “mailbox” for incoming messages + a dedicated lock for it: */
@@ -62,7 +61,10 @@ typedef struct cell_rt {
   struct { Uint32 key; JSValue value; } *timers;
 
   int state;
-  Uint32 ar;
+  Uint32 ar;  // timer for unneeded
+  double ar_secs;  // time for unneeded
+  JSValue unneeded;  // fn to call before unneeded
+    
   int need_stop;
   int disrupt;
   int main_thread_only;
@@ -73,13 +75,12 @@ typedef struct cell_rt {
   const char *name; // human friendly name
 } cell_rt;
 
-extern SDL_ThreadID main_thread;
 extern SDL_TLSID prosperon_id;
 
 extern cell_rt *root_cell; // first actor in the system
 
 cell_rt *create_actor(void *wota, void (*hook)(JSContext*));
-const char *register_actor(const char *id, cell_rt *actor, int mainthread, JSValue config);
+const char *register_actor(const char *id, cell_rt *actor, int mainthread, double ar);
 void actor_disrupt(cell_rt *actor);
 
 const char *send_message(const char *id, void *msg);
diff --git a/source/qjs_actor.c b/source/qjs_actor.c
index be639f8f..826ae657 100644
--- a/source/qjs_actor.c
+++ b/source/qjs_actor.c
@@ -100,7 +100,9 @@ JSC_CCALL(os_mailbox_push,
 JSC_CCALL(os_register_actor,
   cell_rt *rt = JS_GetContextOpaque(js);
   const char *id = JS_ToCString(js, argv[0]);
-  const char *err = register_actor(id, rt, JS_ToBool(js, argv[2]), argv[3]);
+  double ar;
+  JS_ToFloat64(js, &ar, argv[3]);
+  const char *err = register_actor(id, rt, JS_ToBool(js, argv[2]), ar);
   if (err) return JS_ThrowInternalError(js, "Could not register actor: %s", err);
   rt->message_handle = JS_DupValue(js, argv[1]);
   rt->context = js;
@@ -126,7 +128,7 @@ JSC_CCALL(os_unneeded,
   }
   
   actor->unneeded = JS_DupValue(js, argv[0]);
-  JS_ToFloat64(js, &actor->unneeded_secs, argv[1]);
+  JS_ToFloat64(js, &actor->ar_secs, argv[1]);
 
   END:
   if (actor->ar) {