Joined surface into a solid

 From:  Phiro
9670.7 
hi,

A solution could be to extract edges by selecting/copying/pasting.
Then delete (or hide) surfaces to work on edges to avoid all the mistake.
- align points or planes
- delete the strange things on the curves
- redo the networks and verify step by step to find where are the problems
- redo the process until all is OK...
Result after an hour of tests is near your source but is a solid (YES !)

Perhaps the simpliest way is to redo the solid from scratch... But this was a interesting exercice for my others models..

I post the result I have now...
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