After having seen a TF b-25 flown with a pair of os 70's I decided to peel the os 70 pumpers out of mine "unflown as of yet " and replace them with a pair of os 91's any thoughts or warnings from someone who has done this would be greatly appreciated, I"m just thinking the 70's are just a tad too scale and under powered for my liking.
Thanks in advance
Elton