Fusion 360 / CAD Designer Needed to Split Large 3D Model for Printing

I have an existing 3D model (750mm x 243mm x 15mm) that needs to be split into 3 printable sections for FDM printing. The goal is to create a clean, professional design that assembles with nearly invisible seams. Requirements Split the model into 3 parts that fit on a standard 3D printer build plate. Design hidden tongue-and-groove joints between each section. Add alignment pin holes/dowels so the parts assemble accurately and don't twist. Keep all decorative artwork intact and hide seams as much as possible. Design for PLA/PETG printing. Deliverables Please provide: STEP file (.step) Individual STL files for each section One assembled 3MF file with all three parts correctly positioned for Bambu Studio or Please apply only if you have experience with: Fusion 360 or similar CAD software Designing parts for FDM 3D printing Multi-part assemblies with tongue-and-groove or similar joints When applying, please include examples of similar work and your estimated turnaround time. Note: This is not a modeling-from-scratch project. The model is already complete. I simply need it engineered into three printable pieces with strong, well-designed joints for a clean final assembly.