Is there a way to Drag+Drop the SubTool Master buttons and keep them docked on the UI?
not the normal way. You can probably write a script (record a macro) that will call up subtool master and perform the option that you want.
I haven’t tried myself though.
Macro, good idea! 
…I need to figure out how to get my macros to show up after i save them.
put them in your misc folder. the zscript, the .psd and the .txt.
Go into macro’s and say reload all macros.
You can then move that new macro button to somewhere in your UI.