I have 6 H9 planes. After I got my head on straight a decided that you have to beefup firewalls & everything else you can get to (as with all ARFs) they have a nice product. The only complaint that I still have with them is there retracts are way undersized. Both the Corsair & the AT6 had to small of wires for the weight of the planes. Once I replaced with larger wires the problem went away. I have Built many planes over the last 30 years. But now I Assemble them. I will get more H9 planes in the future.