I'm trying like heck to model a cowling for a 28% 50cc Edge 540 using MicroStation /J. I've tried using series of degenerate Coons patches but can't seem to get the surfaces smooth enough near the patch joints. Can anyone help? I'm VERY experienced in 3D solid modeling using MicroStation but my experience is limited to non-organic shapes. When it comes to b-spline based surfaces / solids I'm a moron.

My goal is to have the cowling plug CNC'd out of polyurethane foam for subsequent glassing and post-finishing to produce molds from. The cowling will be used on a plane that I'm designing and going to scratch build (if the results are satisfactory I may kit it). The rest of the solid modeling is 98% done and ready to send off to the laser cutters...my only hang-up right now is the cowling.

PLEASE HELP! I'LL HOOK YOU UP, I PROMISE!

Thanks in advance,
-Tom