I recently bought the Nitroplanes SU-26 Sukoi also. Its a nice looking/ nice flying plane. But much of the hardware needs to be replaced. It comes with a large fuel tank, but the fuel tubing must be for a .40 size engine! The wheel axles are just long bolts. I replaced them with heavy duty Dubro wheel axles. Other wise the bolts would just bend due to the weight. You can find a carbon fibre wing tube on "Toybuilt Models" or "Troybuilt Models" website. I can't remember the exact name at the moment. The tube costs about $62.00 and it is half the weight as the stuck tube, but just as strong.

Good luck!