Harris , I read your post and am glad you have given the benefit of your experience.I am in Australia and have the only G.P. Pitts sold here so far.I am assembling the aircraft right now and have been following all posts regarding this plane . My plan is to run an Air Hobbies 4.6 cui Thompson Trophy twin in this plane! After reading the post about cabane mounting problems and top wing failure i am convinced i'm going to have to strip the covering from the top wing and strengthen the cabane mounts.I also plan to resheet the centre section with one piece of aircraft ply sheeting so there are no joins in the top wing sheeting at all. What do you think? Also when i was assembling the lower wing i have fibreglassed the centre join with 3oz cloth and polyester resin.I know i am adding weight and the wing loading will be up there , but i figure i have more than enough power to offset this if the aircraft will hang together! I guess when the G.P Pitts was designed and tested they didn't have an engine in mind that would try to rip the wings off! I however have different plans. I know people will comlpain that there shouldn't be any problems if the aircraft is used within the manufacturers design specifications , but i feel if your putting one of these together you shouldn't be afraid to modify the design if you think that the structure isnt up to YOUR standards.Forget about what anybody else thinks , it's your plane , engine and radio gear that's at risk at the end of the day , not to mention the safety of innocent bystanders ! I don't care about complaining to a maufacturer if something goes wrong , after all it's my experience or inexperience that will make or break it! I'd rather rely on factual reporting on strengths or weaknesses from fellow aeromodellers at the end of the day to guide me on which way to go when building or assembling any model. So thanks again Harris as without people like you , people like me would end up finding out the hard way. When i finish the model i intend to have no mercy with g forces. I will post pics of my assembly / modifications so that people can decide wether they like what i've done or not.If i come up with anything that i think is a major safety issue i'll certainly post it on R/C Universe , after all thats what it's all about anyway isn't it?