Choice of 15ft & 20ft radius dish for arching guitar backs.
The 20ft radius is used on vintage Martin guitars. It is an extremely popular choice for luthiers.
The 15ft radius is the most common radii used for modern acoustic guitars.
The dishes are precision made by CNC from MDF.
As MDF can warp when a portion of material is routed out we recommend gluing or screwing the dish onto another flat board to preserve its radius. You can also clamping the corners of the dish before using it.
The high quality sanding discs are included in the purchase.