I fly the MVVS 49, Webra 50, OS 46FX, Enya 50CX, ST 40 and 45 (ring) and the Rossi 45 (Powerhouse) RE. I had a TT Pro 61. All fly 11x6 APC or MAS props except the ST 40's. I use nothing but 10% Cool Power. The MVVS 49 will approach 15,000 rpm (tuned silencer) and the Webra 50 Speed slightly exceeds 14,000 rpm, The Rossi, OS 46FX (baffleless muffler) reach 13,000 to 13,100, and the Enya 50CX and ST 45 (ring) ar 12,000 to 12,600 rpm. The ST 40GS with 15% Cool Power and 10x6 MAS prop can hit 15,000 rpm for our ST 40/4*40 races. Fuel and prop supplied by club. Right now there isn't one TT Pro 46 flying at our club that I now about. We have a TT 42 and I another tolerated TT pro 61's till last fall. I replaced mine with ST 61 ring in a GP FW-190B ARF and the other was replaced by a OS 61FX in a SIG 4*60.