NFC Square Brick Design

I need a simple 3D CAD model designed for a small weighted desk block that will contain a hidden NFC sticker.

This is a mechanical/enclosure design only. No electronics design is needed.

### Dimensions
- Overall size: approximately 60 mm × 60 mm × 24 mm
- Square shape with rounded corners
- Corner radius: approximately 8–10 mm
- Slightly softened/beveled exterior edges
- Flat top and bottom

### Exterior
- Clean, minimal design
- Engraved/recessed text saying **BRICK** centered on the top
- Bold, simple sans-serif font
- Text approximately 25–30 mm wide
- Engraving depth approximately 0.5–0.8 mm
- Text should be recessed, not raised

### NFC Sticker Compartment
A 25 mm diameter round NFC sticker will be placed inside the block.

Requirements:
- Circular recess on the inside of the top surface
- Approximately 27 mm diameter
- Approximately 0.5–0.7 mm deep
- Centered underneath the BRICK text
- Only approximately 1–1.5 mm of plastic between the NFC sticker and the exterior top surface
- NFC sticker must sit flat
- Center area behind the NFC sticker should remain free of metal

### Weight Compartments
I want the finished object to feel heavy and stay firmly on a desk.

- Include internal cavities for steel washers or other small metal weights
- Weight cavities should be located toward the bottom and outer edges/corners
- Keep metal away from the NFC sticker area
- Target finished weight is approximately 120–160 g after weights are installed
- Weight should be adjustable before final assembly

### Bottom
- Separate removable bottom plate
- Approximately 2 mm thick
- Press-fit or snap-fit preferred
- It can be designed to be glued permanently after assembly
- Must allow access for installing the NFC sticker and weights
- Include a shallow recessed area on the exterior bottom for a rubber/non-slip pad

### 3D Printing
The model should be suitable for FDM 3D printing using PLA/PLA+.

Please design with realistic print tolerances for the removable bottom piece.

### Deliverables
Please provide:
- STL files ready for 3D printing
- STEP/STP file
- Original/editable CAD file if possible
- Separate files for the main body and bottom plate

Please include your total price and estimated turnaround time in your proposal.

This should be a fairly simple model. I am mainly looking for someone who can make it clean, dimensionally accurate, and easy to assemble.