Wow I did'nt know there was anyone but me flying this thing, when I first got my USL120 I seached on RCU for a thread about and there was none.
As for answer to all the questions the brison 2.4 is on 1/2 plywood standoffs so I could get the fuel line though the fire wall as the brison mount takes up the whole fire wall then it's bolted on with blind nuts the fire wall has been reinforced. my brison has the mechicanal advance ,no real reason not to use the atuo advance unit I just like the mechicanal one .here are a few pics that might answer the rest of the questions.
WYLDMAN