"... For me, every improvement in the Fillets area would be the most welcome addition. "

I agree. For me, the operation that fails the most is Fillets. I know why they are failing and it's generally when I have a tapered situation or sharp angles.

Having new advanced features does no good if one can't get the basic modeling accomplished.

Not to be taken as a criticism, just an input - I enjoy using MoI.

Ed