bof wrote:


You should just need to cut at 1/2 the angle the corner is, if it's 90,
then cut at 45, if angle is 100 cut at 50, if it's an external angle
it's the same, 270 corner cut at 135; I've done a couple of odd wall
corners with 150 and 120 angles. The only trick needed is to cut the
coving at the angle it will meet the other piece at the corner, i.e.
stand the coving on its edge, rather than laying it flat.

Is this any good?

http://www.magicmitre.co.uk/

Roger.