I finally got how to create a dome and punch holes through it for a pressure washer pipe 'cleaning accessory head.
The first with the flange is a 'Solid in Entity Info, but the second is not .
I put a flange on it, but realised I need to put a stub on it. So I have edited it, removed the flange, used the follow me too to create new edge with follow me , pulled it down to create a a stub downwards.
But it is not being reported as a solid…and I can’t work out why.
washer fitting.skp (555.8 KB)
What is stopping the second one from being a solid?