Rick, I agree. So far Sierra has been the same with me regarding the Robertson conversion, no return calls, apparently no interest. You have to wonder why they bought the STC's (probably for the 400 series mod's). Maybe they'd sell the 337 STC!

At any rate, I noticed you have a lot of Owen's mod's. What is his STOL mod (leading edge cuff or ???)? Also, what is your feedback on quality of Owen's work, etc. I've heard mixed reviews on the tail skirts and winglets. Do you know anyone that has done one of his big engine upgrades?