Curious results

 From:  steve (STEVE_HOME)
3457.2 In reply to 3457.1 
Hi Colin,

Hope you dont mind my making a reply.

The 2 surface edges appear to be out of tolerance for a join, there is a gap.

I deleted the bottom part of the ring and made a sweep from the edge (highlighted in pic) using the circle as a path, then trimmed that sweep with the horizontal line I added (then removing the top half of the sweep). The 2 parts then joined OK.

- Steve