pic_0026.jpg resized top 3 areas pushpulled the botttom one Context Intersect with selection
pic_0027.jpg Trim and remeasured Tested the volume and smoothed the edges Tranpanency mode
pic_0028.jpg
My error was inside material need deleted before runing the test
If makring a ring skin then
10) After push-pull smooth the pull volume
11) Context Intersect with selection
12) Make group then explode, use the erase on back edges
pic_0035.jpg
13) Done
pic_0036.jpg
I hope this may help?