I don't quiet get it, 10500 rpm on 6x4 prop in glow version?
It should do at least 16500 on a 6x3 in the stock version, and will do about those revs on a APC 6.3X4 with a proper glow head.
I think the piston/liner fit is a bit sloppy for an ABN engine, mine is proone to overheating and it feels a bit like it is already worn out...
I haven't tached my PAW 55 (BB and RC) yet, but it feels much more powerful than the TT07, inspite of being less than half the size...

Surely a BB PAW 061 in RC with a muffler would eliminate the need for coverting the TT?