Menz Prop
From my experience, Gerhard (owner of Aircraft Intl) has always been responsive to e-mails. I have never tried to telephone him but he has been very helpful in the past. Some of the distributors of giant scale engines seem to be extremely busy (I guess everyone wants giant scale engine..go figure). Try to get a hold of Mike Dooley at RC Showcase sometime! You may want to give Bobby at Cactus Aviation a call for a 3w engine. I recently purchased a 3w-240 from him and his service was excellent. He responds to e-mails and is available by phone. In terms of props, did you consider the Bambula(from RC showcase) or 3w wood props as an alternative to the menz props? The Bambula are reasonably priced and seem to work fine.