How to do this is MOI???

 From:  Michael Gibson
6764.4 In reply to 6764.1 
Hi Bob, so something more like this (also see attached 3DM file):




So note there that I've got as few surfaces and edges in the base model as possible, it's not all diced up into little fragmentary parts yet. Then that kind of clean structure can be filleted. Only try to dice things up into further pieces once that filleting has been finished.

It can also help for things like the outer cylinder surface to be just one big surface running all the way down including the outer legs right in that one surface rather than those as separate pieces. What I did in this case was to do them separately with an extruded arc to start with though and then made one big extruded cylinder surface and used Edit > Trim to cut it up and then joined that in place of the 2 separate vertical surface to get a really clean and minimal structured base object. Having clean and nonfragmented structures like this will help avoid a lot of filleting problems.

- Michael