I spent today testing if this CNC-Dremel could mill aluminium. Specifically I'd like to mill (instead of hand file) these odd shaped holes that are needed in front-panels of electronics enclosures. 

I'm trying terminal posts first - two slightly different sizes. 

1. Good smaller fit. 
2. Too big. 
3. Clamping failed. 
4. Good larger fit.

On the positive side: No tedious filing. On the negative side: Each hole takes almost an hour. 

It's do-able but I can tell that the forces are almost too much.