Thanks for the compliments! It isn't particularly difficult, just takes some time and planning. To make routed bowls you need a bowl bit and collet extension. You cut out a template from 1/2" mdf and tape it with carpet tape to the blank, then you use a forstner bit in the drill press to remove most of the wood in the cavity. Next you use the router bit to finish the work on the cavity. Next you cut out the outside shape on the band saw, and then use a pattern bit in a router table to cut the wood flush with the outside of the template. A roundover bit inside and out on the router table takes care of the sharp edges. All that's left is a lot of sanding and your favorite finish. These were mostly poplar except for the two redish ones which are cherry. All are 2" thick.