Thank you for sharing this—it’s a wonderful way to enjoy a 3D mouse without the high cost. While I was putting it together, These are just some minor "soft reminders" based on my build experience: 1.Regarding the inserts: I found that using M2.5 heat-set inserts with a slightly larger outer diameter (like OD 4.2) feels a bit more secure and helps them stay in place better. 2.About the holes: Making the screw holes "through-holes" might be a nice touch. It helps prevent any issues if someone uses a screw that’s just a tiny bit longer than expected, so they don't accidentally push through the bottom. 3. On the assembly steps: I tried assembling the top frame and knob first before attaching the base and cap. It felt a bit easier because I didn't need to hold all the parts together at once or use longer screws. It might make the process feel a bit more "stress-free" for new makers! Again, thank you for the amazing work!

Great design! To clearly distinguish it from a real firearm, I used vibrant colors for printing. Compared to my GBB version FMG9, this one is slightly larger in size. The entire build was printed using PETG-HF, which should provide sufficient strength. Additionally, I modified the grip’s water storage cap so it can be easily opened by hand for convenient refilling.