Heya Twister,
Greetings and welcome. Great hobby, but I'm biased... ?
I'm busy putting tigether a list of projects we've seen around these-parts :
http://www.guitarforum.co.za/general-discussion/buildmodrefurb-threads/msg270711/#msg270711 - Alas nothing on the hot rod truss rods - perhaphs check out www.tdpri.com for more info on how the hot rod compares. There's a couple of local builders hanging out in "Gregory's Garage" facebook group that should be able to share opinions.
Group buys don't happen too often, although I know guys do get together and do a stew-mac/juststrings orders and share shipping/duties. Again, Gregory's Garage is possibly your best bet right now.