Finally I got to try the method today, and it seems really good. The braces are easily radiused with some sanding paper on the disc, and will exactly match the back when gluing on the same spot they were sanded.
Hope a few pics will explain it better.
|The "cradle" for routing the concave disc. Behind it the actual Go-Bar system|
|the railway for the router, with proper radius sanded to it|
|and here we go. Takes a few passes to make it smooth.|
|...and is pretty dusty too!|
|And here is the Go-Bar system in use. The wooden rods provide the clamping pressure|
|Jyrki, here I come! Not too many months anymore|