Check for binding along the main shaft, where the center hub is and the slide block slides on the center hub. I had a cracked slide block and it would jump up about 3 feet.
For blades, I stopped using the woodies after 4 sets in less then an hour

I went with these:\
http://www.helidirect.com/235mm-glos...axe-p-4340.hdx
They work for the AXE V2 with the bell hiller mods.
Dru.