Automotive STP Feature & Surface Refinement

I have a set of STP files that are almost production–ready, but a few areas still need attention before they can move to tooling. Specifically, I want to introduce new features that blend naturally with... (Budget: £20 - £250 GBP, Jobs: 3D CAD, 3D Design, 3D Modelling, Automotive Engineering, CAD / SolidWorks, CAD Drafting Review, CAD/CAM, Mechanical Engineering, Product Design)