I like the 23A the best so far on my EF Yak/366GT--Im getting 7100 with the STOCK muffler--more than enough power
Yes it doesn't jump out of a hover but it does pull very well and steady--For slow 3D stuff its the best---makes harriers and rollers very steady and it really throws a lot of air over the surfaces at slow speed..the 23B is pretty close--so close that if I switched between the 2 I don't have to change the needles at all...