Netters, I read an article in Sport Aviation a while back that described the good and bad of wings tanks, specifically tip tanks, such as on the Celerity homebuilt, and Cessna 310 production aircraft. Although one has to correctly manage fuel usage, the article explained how the weight of fuel being out board actually lowered the loads on the wing root, spreading the flight loads more evenly across the spar. Though not as pronounced as tip tanks, I can only guess that this must also be true of the wet wings. Also, Mark pointed out that wetwings in the KR2 and S would facilitate better fuel transfer due to the assistance of the wing dihedral to fuel flow. I fly certificated aircraft everyday that have integrated fuel cells and tanks, similar to the ones made by Dana, and I have to say that the CG control, and flexibility is much better. In my personal case, I will be adding an under seat tank of approximately 5 gallons useable, that will refill the header tank prior to landing and will have an inexpensive sending unit /gauge to know volume. Just my opinion... Colin Rainey KR2(td) crain...@cfl.rr.com Sanford, Florida FLY SAFE!!!!