based on my rpms and others i would say 23a, or even 22b vess. i dont 3d much but i do play alittle to my skill level anyway but my yak is 19lbs and the 23a really moved my plane around well. but the prop is loud. i tried a menz 23/8 and it seemed to load the motor some but it could have been the 6 coats of poly to balance the prop to. so far i have tried a xoar 22/8,menz 23/8,vess23b,mejzlik22/8. i liked them all except the menz. maybe a smaller menz might be ok for breaking in. like i said before a 23a spun at 7400 on the first tank of fuel so i would be a 22a would be in the 7600 range with stock exhaust. to me that seems a little high. on the vess i measured 30lbs of thrust.