Other than wood and glass there are Shop supplies.. sand paper, sanding sleeves for my spindle Sander, paper for my mouse sander, belts for belt sander, band saw blades, nock files, spray finish, ,acetone, denatured alcohol,masking tape. Glue, smooth on, plastic wrap, etc...cost me at least $200 to build a one piece bow with pretty veneers. I don't grind tapers I buy them, I do cut my veneers and riser blocks