Sounds like a fun day. Might organise one for down this way one of these days.
Good stuff 
. I can relate exactly to what you are talking about with Firepower and I am still using my old playfield 
Man, you gotta get that playfield in!! Firepower is my most played game - like AFM - easy to understand rules, extremely rewarding gameplay, and it went from great to sensational with the new field.
