Hi Anthony and welcome to MoI :)

I always like a challenge and I always push MoI to find the best solution, hope you don't mind.
I've probably mentioned this before, but I always tend to start off modeling with simple geometric shapes, where possible of course, like arcs, circles and primitive solids, not only in MoI but in all 3d solid modelers, I feel the software has an easier time calculating stuff out and achieving what you want, like Michael has mentioned already, bigger is better, starting off with a nicer larger surface and trimming to shape is the way to go with NURBS.

Anyway, I usually take the solid modeling approach and use surfaces, curves and other solids to carve things out a bigger solid, like Michaels example here
I've attached a version of your model taking this approach and left all the entities that I used to create it, they are hidden, unfortunately it's in colour, V1 demo won't see the colour it's just easier to see what was used for what.
Is this what you were looking for? any questions, feel free.

Cheers