Guys, I can't elaborate right now, but I think it is the right decision. Because the Club 40 airplanes are "dirty" compared to a Quickie, and because Club 40 rules allows any stock prop, the Club 40 airplanes should benefit from the greater torque of the .46 displacement.
Don Stegall recognized this in his comment:
I did tests with heavier props and the 46NX could pull a 10x7 to more than 1000 rpm's over a TT PRO 40 trying to turn it. With our heavier and draggier Club 40 planes, the prop makes a big difference because of the additional torque that the 46NX seems to have. Later, Greg