Has anybody opened a Mamba Maxx motor?

I had sand inside my motor and I was going to try to open it up like a Fegao until one of the screw heads broke off so I ended up shaking the sand out. For the future, is it hard to open these motors up?

btw, Seal around the wires if you plan on going in the sand. I ended up damaging my MM controlled and killed a 3s lipo!