Hi Tony, a lot of the weight in a file like that will be in the little polygons that you'll get on fillet surfaces.

To reduce the generated file size you'll need to have fewer polygons generated.

Probably the easiest way to do that is to expand the Meshing options dialog by the arrow in the bottom left corner to get the detailed controls, and then put in a distance value for "Avoid smaller than". Try putting in a value of one-half of your fillet radius distance.

With that parameter any polygons that are smaller than that distance will use a rougher angle value and so will not get refined as much, resulting in fewer polygons.

You also might want to not have fillets on everything, if you can leave them off or do a chamfer instead that can also lighten up the output file size a lot as well.

- Michael