I glued and screwed some exterior plywood together and routed a groove to bend the 3/8" 4130 for the fender mount.  Looks real good.

 This will be the only location for the rear fender stay mount.  I'm going to run some hammered aluminum fenders that only require one stay.

I'm thinking that this radius is a little too tight visually and I might open it up a little.  I'll cut and fit it and then decide.