diff --git a/src/vybe/flecs.clj b/src/vybe/flecs.clj
index 0bf9a543..454321de 100644
--- a/src/vybe/flecs.clj
+++ b/src/vybe/flecs.clj
@@ -250,7 +250,8 @@
          (-set-c this k v)
          this)
   (dissoc [this k]
-          (vf.c/ecs-delete this (ent this k))
+          (when (get this k)
+            (vf.c/ecs-delete this (ent this k)))
           this)
   (keys [this] (-world-entities this))
   (keySet [this] (set (potemkin.collections/keys* this)))
@@ -1458,16 +1459,20 @@
                          [k v])
                        (concat (partition 2 bindings)
                                (list (list w :vf/world))))
+        bindings-map (into {} bindings)
+        _ (when-not (:vf/name bindings-map)
+            (throw (ex-info "`with-system` requires a :vf/name" {:bindings bindings
+                                                                 :body body})))
         code `(-system ~w ~(mapv (fn [[k v]] [`(quote ~k) v]) bindings)
-                       (fn [~(vec (remove keyword? (mapv first bindings)))]
+                       (fn ~(symbol (str (namespace (:vf/name bindings-map))
+                                         "__"
+                                         (name (:vf/name bindings-map))))
+                         [~(vec (remove keyword? (mapv first bindings)))]
                          (try
                            ~@body
                            (catch Throwable e#
                              (println e#)))))
         hashed (hash code)]
-    (when-not (contains? (set (mapv first bindings)) :vf/name)
-      (throw (ex-info "`with-system` requires a :vf/name" {:bindings bindings
-                                                           :body body})))
     `(let [hashed# (hash ~(mapv last bindings))]
        (or (when-let [e# (get-in @*-each-cache [(vp/mem ~w) [~hashed hashed#]])]
              (when (vf.c/ecs-is-alive ~w (ent ~w e#))
@@ -1566,8 +1571,15 @@
                          [k v])
                        (concat (partition 2 bindings)
                                (list (list w :vf/world))))
+        bindings-map (into {} bindings)
+        _ (when-not (:vf/name bindings-map)
+            (throw (ex-info "`with-system` requires a :vf/name" {:bindings bindings
+                                                                 :body body})))
         code `(-observer ~w ~(mapv (fn [[k v]] [`(quote ~k) v]) bindings)
-                         (fn [~(vec (remove keyword? (mapv first bindings)))]
+                         (fn ~(symbol (str (namespace (:vf/name bindings-map))
+                                           "__"
+                                           (name (:vf/name bindings-map))))
+                           [~(vec (remove keyword? (mapv first bindings)))]
                            (try
                              ~@body
                              (catch Throwable e#
diff --git a/src/vybe/flecs/impl.clj b/src/vybe/flecs/impl.clj
index be4cb89a..e61e8d97 100644
--- a/src/vybe/flecs/impl.clj
+++ b/src/vybe/flecs/impl.clj
@@ -120,6 +120,13 @@
                             :main-thread? (nil? ret)})))))))
 #_ (def methods-to-intern (-methods))
 
+(defn -debug
+  [v]
+  (let [t (type v)]
+    (if (contains? #{Long String Boolean} t)
+      v
+      t)))
+
 (defmacro -intern-methods
   [init size]
   `(do ~(->> (-methods)
@@ -145,7 +152,7 @@
                             ~(mapv (comp symbol :name) args)
                             ;; Fn body.
                             `(do #_(println '~'~(csk/->kebab-case-symbol n)
-                                            (mapv type ~~(mapv (comp symbol :name) args)))
+                                            (mapv -debug ~~(mapv (comp symbol :name) args)))
                                  (vp/try-p->map
                                   ~~``(~(symbol "org.vybe.flecs.flecs" ~n)
                                        ~@~(vec
@@ -175,7 +182,7 @@
 #_(macroexpand-1 '(-intern-methods 300 10))
 #_(meta #'draw-text!)
 
-#_(macroexpand-1 '(load-model "OOOB"))
+#_(macroexpand-1 '(ecs-add-id w e id))
 #_(macroexpand-1 '(update-camera! 1 2))
 #_(macroexpand-1 '(get-monitor-name 0))
 
diff --git a/src/vybe/jolt.clj b/src/vybe/jolt.clj
index 1e35716b..fb838706 100644
--- a/src/vybe/jolt.clj
+++ b/src/vybe/jolt.clj
@@ -266,8 +266,10 @@
 
 ;; -- Body
 (defn body-active?
-  [body]
-  (vj.c/jpc-body-is-active body))
+  ([body]
+   (vj.c/jpc-body-is-active body))
+  ([phys body-id]
+   (vj.c/jpc-body-interface-is-active (body-interface phys) body-id)))
 
 (defn body-move
   "Move kinematic body.
@@ -288,6 +290,18 @@
   [phys body-id]
   (vj.c/jpc-body-interface-is-added (body-interface phys) body-id))
 
+(defn body-position
+  [phys body-id]
+  (let [pos (Vector3)]
+    (vj.c/jpc-body-interface-get-position (body-interface phys) body-id pos)
+    pos))
+
+(defn body-rotation
+  [phys body-id]
+  (let [rot (Vector4)]
+    (vj.c/jpc-body-interface-get-rotation (body-interface phys) body-id rot)
+    rot))
+
 ;; -- Misc
 (defonce *temp-allocator
   (delay (vj.c/jpc-temp-allocator-create (* 16 1024 1024))))