Its both the material of the hub and the screws.

I fixed a customers problem by getting 4 40 screws from a hardware store. he stock steel screws are weak and bend easily.

Also, a simple fix (if you don't want to spend a ton on loctite, is use clear fingernail polish on the screw threads. It makes the screw tacky enough to stay in and not vibrate out, yet still soft enough to remove with a little pressure.




MOmo