I got the blades and grips in from helihobby. Fit just fine, worked very good. The blades dont seem to be much stiffer than the stock blades as far as flexing goes, but the blades dont seem to split and shatter as easily as the stock blades. I hovered about 3 ft off the ground and then started danceing it back and forth with full stick side to side and front to back. It took a little bit but i did get the blades to clack once it got almost out of control. Too much wind right now or id go outside and get it moveing fast and see if there is less chance of blade clack with these blades at high speed. So far i would say it looks like the best mod ive tried.