The robart gear are a bit stronger than the springairs but both work good. If you go with the springairs then get (or make) the support blocks that Top Gun sells, becuase the gear load on the roo is from the side it tends to bend the frames on rough terrain/landings. I allways liked the springair gear, use them in every plane I had including my roo but decided to install the robarts after I bent the frames a few times, Robarts are stronger for the type of load being applied.
Todd