Quoted from JimWilks:
Got the boost regulator. Boy is it small!
Installed it and mod is working fine now.
Sorry for the pic being out of focus, but you get the idea of size relative to a dime.
I think I may have this same issue! I did not order Scott's mod, but built it myself - I am following the exact connections, code, and setup as Jeremy's original setup, plus a couple of changes I've read about in the thread - and I'm getting basically the same behavior.
The servo moves a bit when first powered on, but then after that it just sort of hums and I hear an adjustment move here and there, but nothing occurs when the switch is triggered.
I haven't worked on this mod in a few weeks, having started on a game restore, but I went over everything today - switched to another Nano, even. Same behavior. I have not checked the debug log yet, so I will do that next and make sure the switch is being registered. Bummer, this one!