3D Dragon Model Split and Adjustments

Hello! I already have the 3D dragon model. I need you to do the following final steps:

1. Split the Model Into Two Separate Parts

Outer Dragon Shell (decorative cover)
Inner PC Chassis (functional structure where PC components mount)
The inner chassis must include space + mount points for:
Motherboard (ITX or mATX)
GPU slot
PSU slot (SFX or ATX – we will finalize)
120mm fan mounts (front chest + optional side vents)
Back I/O + PSU opening like a real PC case
Screw holes + alignment pegs for attaching shell to chassis
2. Cut the Outer Dragon Shell Into 3D Printable Pieces

My printer build volume: 250 × 250 × 250 mm (Bambu A1)
Shell must be cut into sections that fit this size
Each part needs alignment pins or assembly joints (not glued)
Output: STL files per piece, labeled properly
3. Minor Adjustments Needed

Hollow out the shell to reduce material + weight (2–3 mm wall thickness)
Add internal LED space (eyes / heart glow)
Make sure overhangs are printable with minimal supports
4. Final Deliverables

. Outer shell pieces (STL)

. Inner chassis (STL + if possible STEP)

. Assembly layout or exploded view

. All pieces tested to fit 250mm³ build volume