Well, as bpryor pointed out the Mvvs/Evolution 45 engines are happier swinging the larger (24") props. That's not going to work too well with my Extra 260. I had a custom composite landing gear made for it that had longer legs and it didn't look right. The stock (scale) gear is going to be too short for a 24 inch prop. My plane needs a 20" prop, so now I'm back to either a Brison 2.4 or the Taurus 2.4 It looks like the Brison is lighter but I'm not sure how they compare in power.