Use what ever speed you need to cut it, with mine low speed cut it no problem at all. If you have the one with a rechargeable battery, fast speed may be needed. Yes it makes some dust but its nothing to worry about, do it in the garage or outside if you are conserned but i don't think there is a need for a mask. Do exactly like andy said... use the cut off wheel for intitial holes then clean it up with the sanding drum.


Chad