Hi Glenn Claes,

...you're welcome.

One last suggestion...

In the event that some or all surfaces of your model are trimmed, then maybe there's one additional step
to follow in order to better achieve the wanted result :

(link to my previous post http://moi3d.com/forum/index.php?webtag=MOI&msg=7982.2)

1) Select your part
2) Unjoin all its surfaces

2B) Execute the "ShrinkTrimmedSrf" command on all the selected surfaces
2C) select again all the surfaces

3) ...
4) ...

Nice day,

Marco (mkdm).