I would like to fix a small table we have it is about 18" high and 12 round. It has a turned spindle and three legs attached by dove tails. The bottom legs broke when someone fell on it. I have been able to turn a new bottom piece and put the dovetails slots in it. But how can I cut the dovetails for the legs so they conform to round of the spindle?

Thanks for any help you can give me.
Charles Brady