I use impact gun as well. Never had any problem with dissasembly, but the nut needs to be torqued to, I think 58 foot pounds, I don't have my manual in the house and you need something to keep the basket from spinning while you torque it down. Aluminum anything, "wheels, heads, etc.", have very specific torque settings because it expands and compresses and does things that steel will not.
Woody223