Thanks. Yesterday I bought the Boss GT1000 Core. Played with headphones for a while. Then played through a GMW guitar into my Dr Z Maz Jr, just straight in the front. So far, love it. Easy to program, very powerful, small, perfect for my needs.
1) I need to turn off the Core's pre-amps if I'm going through one of my tube Amps.
2) I will set presets patches for going through Tube amps, A) probably 4 cable method setup and a B) straight in the front, and also a C) separate set for going straight to FOH.
3) For fly to gigs, I'll probably just bring a guitar and this. Simple.