Hi Billabong, here is a version with the hole you were trying to patch filled in.

I put in a plane through that area and reconstructed the vertical surfaces around the hole to extend past the plane and get trimmed by the plane:



- Michael

Free Onshape online can open a Moi 3DM format !
https://cad.onshape.com
You can of course use it as a converter! ;)

For import a file press "+" left Bottom page!

OnShape is a monster! :)