Adjust Brick Mould CAD Files

I already have the original AutoCAD files for a mould that currently outputs a 445 mm L × 150 mm W × 220 mm H brick. I need your help identifying exactly which elements in those drawings control the finished size, then updating them so I can manufacture three new variants:

• 450 mm L × 150 mm W × 220 mm H
• 450 mm L × 220 mm W × 220 mm H
• 450 mm L × 120 mm W × 220 mm H

All edits must stay fully compatible with AutoCAD and be supplied back to me as clean, production-ready DXF files—one file per new mould. Keep layer structure and naming consistent with the originals so my shop workflow remains unchanged.

I will provide the current DWG/DXF set as soon as we start; you pinpoint the governing dimensions, adjust them, check overall fit and tolerances, then return the updated DXFs. Once I verify each file opens correctly and measures to spec, the job is done.