Convert CAD Units & Grid

I have a structural plan drawn in AutoCAD where every dimension is shown in millimetres and the main grid sits at the centre of the structure. All I need is a clean, accurate conversion of those dimensions into feet – nothing more – and the grid shifted so it aligns with the outer edge instead of the centre. No redraws, no extra detailing or layers; simply update the existing DWG and return it to me in the same format so the rest of the team can keep working without interruption. If you work daily with AutoCAD, understand unit settings and grid references, and can turn this around quickly, let’s get started.