I also have the Polar Pro landing gear. I agree with PC, you have to be a little careful with the front gear so you don't put too much pressure on the legs. The rear legs, though, are very fragile. I have already broke one of them. The good news is, Polar Pro has shipped out new landing gear! I will be a little more careful next time.
There is a really good instructional video on YouTube on how and where to put the rear landing gear!