Exterior Shape Adjustment for 3D Model

I already have a complete 3D model; however, the exterior lines and proportions are slightly off. I need someone to jump into the native file, focus solely on the external surfaces, and refine the shapes so they match the reference drawings I will supply.

Here is what I will provide:
• Current model file (in both the native format and an exported .FBX)
• Reference images and dimensioned sketches highlighting the problem areas
• Notes on visual style so you can keep existing materials and UVs intact while working

What I need back:
• The updated model with corrected exterior geometry
• A brief change log so I can see what was modified
• Exported files in the same formats I sent

Please make sure all edge loops remain clean, normals stay consistent, and the topology supports future subdivision—no new elements or material tweaks, just shape adjustments. If you are comfortable working in Blender, Maya, 3ds Max, or a similar package and can turn this around quickly, let’s get started.