We are pleased to announce the release of #Nonica Beta Edition v1.0 for FREE.
With our simple tool, you will be able to integrate 3 Dynamo Scripts into your Revit toolbar. You only need to drag and drop your Dynamo Scripts into our folder to easily integrate them into your Revit toolbar.
Thanks for your reply. Revit API is limited and only allows to create supported buttons in Analyze and AddIns Tab apart from creating a new one. I am sorry but this is all I can do for the moment.
You could try mapping a keyboard shortcut to any given button to speed things up even faster than adding to the modify tab - info here: CreateAddInCommandBinding Method