Good news, the bit can easily handle that super fine MDF. I cut at 1.1mm DOC at 30k RPM’s with ease. Might be able to do a little more. Bad news is my table top was so off, that cutting the spoilboard flat created so much dust I decided not to cut a pocket for my mirror and just set it on top of the spoilboard and find a way to attach it. The good news I should be up and printing this weekend.