Hi Bill,

Not sure what the dowel shapes on the underside of your object are, but here is an approach
to create a more uniform solid that will fillet more easily.

I traced a top view and created 4 contours that I lofted, then used the top trace to boolean intersect
with the lofted face. If you Show points on the result you can work with a simple cage to smooth if you wish.

3DM file attached....

HTH



EDIT: you have to be fast to post before Michael... ;)