Young Mopar fan bringing the A-925 to life.

I didnt thank about the macro approach. Right now, I extruded the overall solid. Inventor has a feature where you can paint brush select multiple stl triangles and the program can generate a spline surface. Then i use that to remove material. Just discovered it last night.

Oof. I'm a fan of 'use what works', but I've found over the years it's often better to not use the original data to constrain model features/geometry.

Often making a 'fresh' model and massaging it to match the scan data will result in something more usable for your manufacturers. If in doubt, share your model/geometry with the shops you plan to work with to see if they can use your data and adjust accordingly. Most shops will be able to use almost anything, but if they have to rebuild a whole new model - they're going to build that into their costs. Just something to be aware of.