Shelling incorrect

The shelling of the face A fails, you could check, please? Thank you.
Shelling incorrect.3dm(224.6 KB)

Rhino should have got this one but it failed to extend a surface and complete the trimming.
In case you need it; Shelling correct.3dm(239.4 KB)

Thanks Marc.
The problem is not so much to achieve this modeling exercise in manual mode, but in automatic. Manually, the shelling which I have proposed are not difficult to achieve, the problem is to get them done automatically in Rhinoceros, without wasting too much time.

Hello :slight_smile: