I just got a set of Dave Brown Lite Flite wheels, 3 1/4", for my Sig 4 star 40. I had 2 3/4" Great Planes lite wheels on there, but needed something bigger for flying from grass. After I put them on, they seem a bit flimsy, like the side walls might lean over. I wanted a lite wheel, and these weigh in a 1.1 oz ea, which is much better than 3.7 oz ea for my Dubro 3 1/2" set that I have. Has anyone used these, and what do you think?