Formula 1 spoiler/aileron STL Refinement

I already own an STL of a Formula One spoiler/aileron, but I'd like to make some adjustments to the panels/wing. Your task is to keep the overall proportions of that file while adjusting the size and angles... (Budget: £20 - £250 GBP, Jobs: 3D Animation, 3D CAD, 3D Design, 3D Modelling, 3D Printing, 3D Rendering, Blender, Fusion 360)