I put a pro com on my speedmaster this weekend. I am running the #10 tune. I am impressed so far. It really pepped up the top end.
did the ton quicker than I recall with the stock CDI.

05 speedmaster - 1100cc, 11:1 racing pistons, Carillo rods, thunderbike cams, ported and polished head, 2mm over intake and exhaust valves, Barnett kevlar clutch, scepter pipes, oversize manifolds, 45mm HSR's, TTP stage 4 firestarter