Hi Martin,

> but the slightly odd thing was that some fillets were made underneath the geometry
> whilst retaining the areas that should have been deleted.

When this happens it means that the filleting engine got confused about how to fully process the entire fillet, especially with figuring out how to cut up the original object with the fillet edges. That can especially happen if one of the fillets did not quite fully extend far enough to form a totally closed boundary for cutting.

When there is some error like that in one of the latter stages of fillet calculation, it will try to return back the pieces that it was able to generate, in the hope that you might be able to use those pieces to complete the fillet by doing manual trimming.


The main thing that would probably make your construction for this case in MoI easier is an improved blend command that could use a longer chain of edges in one blend construction instead of only one pair at a time, that's something that's near the top of my list to work on for v3, it won't make it into this immiment beta but hopefully not long after.


- Michael