I've been branching out in Moi3D from CNC router cut creation into more complicated 3D surface modeling. I have a basic handle on the tools available for creating surfaces but am struggling with intersecting and blending surfaces. See the airplane cowl bellow. It's formed with two large shapes: the spinner radius flow back into the cowl and the main cowling body. I want to intersect the two surfaces, keep the distinct body line that union forms, but create blending fillets to merge the surfaces. I do notice how important it is to keep even and well formed surfaces to have any hope of interesting them and forming a fillet.

Can I create a single surface from two rather than a joined surface?

If I use the boolean to cut a profile out of a surface it's often very complicated with many points forming the newly created edge. Is there any way to simplify this edge and directly manipulate it like the surface profile points?

I'll continue to dig in on YouTube and here no the forum, but any guidance is appreciated!

Craig