diff --git a/examples/example.js b/examples/example.js
index ce391b4..70fd6e7 100644
--- a/examples/example.js
+++ b/examples/example.js
@@ -10,7 +10,8 @@ class Example extends RxClass  {
 
 const example = new Example({
   _rx_ : {
-    // handler: value => {console.log('-----------default subscription handler-------', value)}
+    handler: value => {console.log('-----------default subscription handler-------', value)},
+    amendValue: val => val + 3
   }
 })
 
@@ -21,16 +22,26 @@ console.log('--------------------------')
 example.on('changed', (prop) => console.log('emitted----a property changed-----',prop))
 example.on('test', (val) => console.log('emitted value of test',val))
 
-console.log('making \'test\' reactive')
+console.log('making \'test\' reactive with default amend of add 3')
 example.rxAdd('test')
 console.log('changing test to 20, 30 directly')
 example.test = 20
+example.rxAmendValue() // removes global amend
 example.test = 30
 example.rxSubscribe('test','custom',(prop)=>console.log('#############late subscription to \'test\' after 30 ############',prop))
+console.log('amending emitted value with path',example.rxAmendValue('test','path'))
 console.log('changing test to 40 via set')
 example.set('test',40)
+console.log(
+  'amending emitted value custom function',
+  example.rxAmendValue('test',val => { return { value:val+5, msg:'additional 5 was added to set value'}})
+)
+example.set('test',50)
 
+console.log('removing amend function ',example.rxAmendValue('test',null))
+example.set('test',60)
 console.log('making a deeper property \'another.foo\' reactive')
+console.log('changing any default amend function ',example.rxAmendValue(val=> val + ':amended'))
 example.rxAdd('another.foo')
 
 example.another.foo = 7
diff --git a/package.json b/package.json
index 52f3b93..da2005b 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@uci-utils/rx-class",
-  "version": "0.1.1",
+  "version": "0.1.2",
   "description": "class that support reactive properites",
   "main": "src/rx-class.js",
   "scripts": {
@@ -23,12 +23,12 @@
   },
   "homepage": "https://github.com/uCOMmandIt/uci-utils#readme",
   "dependencies": {
+    "@uci-utils/set-value": "^3.0.3",
     "deep-equal": "^2.0.3",
     "get-value": "^3.0.1",
     "is-plain-obj": "^2.1.0",
     "is-plain-object": "^3.0.0",
     "rxjs": "^6.5.5",
-    "set-value": "^3.0.2",
     "traverse": "^0.6.6",
     "unset-value": "^1.0.0"
   },
diff --git a/src/rx-class.js b/src/rx-class.js
index cf47813..5dc43a0 100644
--- a/src/rx-class.js
+++ b/src/rx-class.js
@@ -18,9 +18,11 @@ export default class RxClass extends EventEmitter {
       event: rxopts.event  || 'changed',
       handler: rxopts.handler,
       props: {},
-      hooks: [],
+      amendValue: rxopts.amendValue,
+      emit_path : rxopts.emit_path,
+      hooks: [], // will add to all setters
       root: '', // root path/namespace to added to all get/set paths
-      operators:[],
+      operators:[],  // will add to all pipes
       skip: rxopts.skip == null ? 0 : rxopts.skip
     }
   }
@@ -71,7 +73,9 @@ export default class RxClass extends EventEmitter {
     // console.log('moving',opts.value != null ? opts.value : value,path)
     rx.value = opts.value != null ? opts.value : value
     rx.path = path
-    rx.obs = from(new BehaviorSubject({value:rx.value, path:rx.path}).pipe(
+    rx.amendValue =  opts.amendValue || this._rx_.amendValue || ((val) => val)
+    if (opts.emit_path || this._rx_.emit_path) rx.amendValue = (value,path) => {return {value:value, path: path}}
+    rx.obs = from(new BehaviorSubject(rx.amendValue(rx.value,rx.path)).pipe(
     // rx.obs = from(new ReplaySubject(1).pipe(
       skip(this._rx_.skip),
       distinctUntilChanged()
@@ -80,6 +84,7 @@ export default class RxClass extends EventEmitter {
     ))
     // console.log(path,'---------------\n',Object.getOwnPropertyNames(Object.getPrototypeOf(rx.obs)),rx.obs.subscribe)
     rx.subs = {}
+    rx.hooks = []
     this.rxSubscribe(rx,'_default',this._rx_.handler,)
     this.rxSubscribe(rx,(opts.subscribe || {}).name,(opts.subscribe ||{}).handler)
     const self = this
@@ -92,10 +97,13 @@ export default class RxClass extends EventEmitter {
       set (value) {
         // console.log('in setter', path,value)
         rx.value = value
-        rx.obs.next({value:value, path:path})
-        self.emit(opts.event || self._rx_.event,{value:value, path:path})
+        value = rx.amendValue(value,path)
+        rx.obs.next(value)
+        self.emit(opts.event || self._rx_.event,value)
         self.emit(path,value)
-        self._rx_.hooks.forEach(hook=>hook.call(self,{value:value, path:path}))
+        // any hook function that already bound will use that context
+        self._rx_.hooks.forEach(hook=>hook.call(self,value))
+        rx.hooks.forEach(hook=>hook.call(self,value))
       }
     })
     return true
@@ -106,6 +114,18 @@ export default class RxClass extends EventEmitter {
     this._rx_.hooks[name]=func
   }
 
+  rxAmendValue(path,func) {
+    let rx = {}
+    if (arguments.length === 0 ) {this._rx_.amendValue= null;return}
+    if (typeof path === 'function') {this._rx_.amendValue=path;return}
+    rx = (typeof path === 'string') ? this._rxGetObj(path) : path
+    if (!rx) return false
+    func = func ? func : (val => val )
+    console.log('amend', func)
+    rx.amendValue = func === 'path' ? (value,path) => {return {value:value, path: path}} : func
+    return !!rx.amendValue
+  }
+
   // if name is only passed remove
   rxOperator(func,name) {
     this._rx_.operators[name]=func