diff --git a/src/components/aside/aside.js b/src/components/aside/aside.js
index ecba2f51da..544ddc4460 100644
--- a/src/components/aside/aside.js
+++ b/src/components/aside/aside.js
@@ -1,5 +1,4 @@
 import {Component, Template, Inject, Parent, NgElement} from 'angular2/angular2'
-import {ComponentConfig} from 'ionic2/config/component-config'
 import * as types from 'ionic2/components/aside/extensions/types'
 import * as gestures from  'ionic2/components/aside/extensions/gestures';
 import {IonicComponent} from 'ionic2/config/component'
@@ -58,15 +57,26 @@ export class Aside {
   }
 }
 
+@Component({
+  selector: 'ion-aside',
+  bind: {
+    content: 'content',
+    side: 'side',
+    dragThreshold: 'dragThreshold'
+  }
+})
+
 new IonicComponent(Aside, {
   bind: {
     side: {
-      default: 'left'
+      value: 'left'
     },
     type: {
-      ios: 'reveal',
-      android: 'overlay',
-      default: 'overlay',
+      defaults: {
+        ios: 'reveal',
+        android: 'overlay',
+        base: 'overlay',
+      }
     },
     dragThreshold: {},
     content: {},
diff --git a/src/components/toolbar/back-button.js b/src/components/toolbar/back-button.js
index e4bee6a23c..2c04dc4ffd 100644
--- a/src/components/toolbar/back-button.js
+++ b/src/components/toolbar/back-button.js
@@ -1,32 +1,37 @@
 import {NgElement, Component, Template} from 'angular2/angular2'
-import {ComponentConfig} from 'ionic2/config/component-config'
-
-export let BackButtonConfig = new ComponentConfig('back-button')
-
-BackButtonConfig
-  .platform('ios', instance => {
-    instance.domElement.querySelector('.back-button-icon').classList.add('ion-ios-arrow-back')
-    instance.domElement.querySelector('.back-default').textContent = 'Back'
-  })
-  .platform('android', instance => {
-    instance.domElement.querySelector('.back-button-icon').classList.add('ion-android-arrow-back')
-  })
+import {IonicComponent} from 'ionic2/config/component'
 
 @Component({
   selector: '.back-button',
-  services: [BackButtonConfig]
 })
 @Template({
   inline: `
-    <icon class="back-button-icon"></icon>
+    <icon [class-name]="'back-button-icon ' + icon"></icon>
     <div class="back-button-text">
       <div class="back-default"></div>
       <div class="back-title"></div>
     </div>`
 })
 export class BackButton {
-  constructor(@NgElement() ngEle:NgElement, configFactory: BackButtonConfig) {
+  constructor(
+    @NgElement() ngEle:NgElement
+  ) {
     this.domElement = ngEle.domElement
-    this.config = configFactory.create(this);
+
+    setTimeout(() => {
+      this.config = BackButton.config.invoke(this)
+    })
   }
 }
+
+new IonicComponent(BackButton, {
+  bind: {
+    icon: {
+      defaults: {
+        ios: 'ion-ios-arrow-back',
+        android: 'ion-android-arrow-back',
+        base: 'ion-chevron-left'
+      }
+    }
+  }
+})
diff --git a/src/config/component.js b/src/config/component.js
index 0349cea5bf..c6e10c3c7d 100644
--- a/src/config/component.js
+++ b/src/config/component.js
@@ -4,6 +4,10 @@ import {platform} from 'ionic2/platform/platform'
 let platforms = Object.keys(platform.registry)
 let platformName = platform.getName()
 
+// Low-level: how the user will override
+// BackButton.config.bind.icon.value = 'ion-chevron-right'
+// BackButton.config._computeDefaultValue(BackButton.config.bind.icon)
+
 export class IonicComponent {
   constructor(ComponentClass, {
     bind,
@@ -18,8 +22,8 @@ export class IonicComponent {
       let binding = bind[attrName]
       if (util.isObject(binding)) {
         binding.property || (binding.property = attrName)
+        this._computeDefaultValue(binding)
         // TODO recompute defaultValue when user possibly adds a binding
-        binding._defaultValue = binding[platformName] || binding.default;
       }
     }
 
@@ -29,6 +33,8 @@ export class IonicComponent {
     // }
   }
   _computeDefaultValue(binding = {}) {
+    let defaults = binding.defaults || {}
+    binding._defaultValue = binding.value || defaults[platformName] || defaults.base;
   }
 
   invoke(instance) {
@@ -50,13 +56,11 @@ export class IonicComponent {
         let cases = (config.delegates || {})[delegateName] || []
         for (let i = 0; i < cases.length; i++) {
           let delegateCase = cases[i]
-          try {
-            if (util.isArray(delegateCase)) {
-              if (delegateCase[0](instance)) return new delegateCase[1](instance)
-            } else {
-              return new delegateCase(instance)
-            }
-          }catch(e){debugger;}
+          if (util.isArray(delegateCase)) {
+            if (delegateCase[0](instance)) return new delegateCase[1](instance)
+          } else {
+            return new delegateCase(instance)
+          }
         }
       }
     }
diff --git a/src/platform/platform.js b/src/platform/platform.js
index ceb5d8184f..23333e3f50 100644
--- a/src/platform/platform.js
+++ b/src/platform/platform.js
@@ -44,7 +44,7 @@ class PlatformController {
   detect() {
     for (let name in this.registry) {
       if (this.registry[name].matcher()) {
-        return platform
+        return this.registry[name]
       }
     }
     return this.defaultPlatform
@@ -74,7 +74,7 @@ platform.register({
 
 // Last case is a catch-all
 platform.setDefaultPlatform({
-  name: 'default'
+  name: 'base'
 })
 
 platform.set( platform.detect() )