On 23/04/2018 11:58, Chris J Dixon wrote:
newshound wrote:

Chamfer offers almost the same visual effect.

My initial option was to suggest that, but the domestic
authorities were not keen.

I find "external" curves
fairly easy to carve using a coarse abrasive disk on a 125 mm angle
grinder. Internal are more difficult, but can still be done. Another
(not ideal) option would be a router.

The crosspieces are nominally 50 mm thick, so hat sounds like a
lot of chewing.

Chris

Oh no, you take most of it out by stitch drilling with something like a
15 mm flat bit.