I have had three spam cans with wing tip tanks. And believe me. I have not always had picture perfect lands through out my flying career. And never have I had a problem that surfaced or that my annuals found any stress points on the wing structure. So, my inclination about the stress indicated by others is something that anyone should consider. But on the other hand I know that for me that until some prof is set in front of me. I will be fine with tip tanks.
And yes, I am installing tip tanks on my KR1. The fuel is at least 6.5' further away from me in the cabin. And it is only 2.3 gal. per side and another 5.8 gal. in ea. outside wing panel in alum. tubes. I will be using an auto fuel pump to bring the fuel to the engine with an electric fuel pump boost. I have a picture on my desk top of a KR2 with tip tanks in flight. I guess I just need more prof if I were not to install them. For now, tip tanks a coming. M. Greg Martin
