Thanks! Here's the tipping process for the rear ring flange. Before marking anything, the panel and both rings were pushed flat to the "table" surface. Then alignment marks added to keep us in the right location....








Marked along the surface of the panel against both rings..





Did an offset line 3/8" away and trimmed. This looked too wide to tip, so I went back and marked again at 3/16".








.....and trimmed again to the 3/16 mark. Changed to a different lower die for tipping this time.... made a complete revolution to "mark" the bend line and then started tipping...








Again went to about a 45 degree tip, placed the ring in the panel to see what needed more tipping....














Tipping along a wavy line does pose some "pulling" issues, so I did have some planishing/stretching to do in some areas. It's real close, but I have some tweaking left to do, and then I'll tackle the second one.