worktop radius

[jonny round boy]

The radius you require depends on the overhang from the carcase, but the Howdens curved units (which I think are the same as the PWS doors) have a carcase radius of 190mm, and the door is 210mm radius. On the howdens units, the carcase is 575 deep, and the tops 615, meaning there is a 40mm overhang from the carcase (20mm from the door) therefore the worktop needs to be about 230mm.

I think you'll have the same with B&Q units - they have a 560 carc depth with a 600 top, so the same 40mm overhang.

As for making a jig, I'd suggest you make one like this:

I can't seem to add pictures - I'll look up how to do that and reply again!