First of all, I found the tolerances on this thing to be super tight. Designer's printer probably has a <0.1mm printing tolerance, where my printer only reliably clears around 0.3mm at the moment. I scaled the whole thing up 3% to properly fit M3 nuts. Of course, you can just melt them into place if you want.
I changed a few things in the construction, nothing major.
- Added nuts on the set screws for the sliding rods to keep the bolt in place, rather than relying on the plastic to retain the bolt. It kept spinning on me, and I wanted the most used part on the setup to be solid.
- I didn't use the two springs on the T-rod for the right hand knob. Didn't seem crucial.
- Added nylock nuts inside of the right hand knob for the 4 bolts. Again, don't trust PLA plastic to retain a threaded bolt forever on a device I want to use for years!
- Longer rods. You can really make this thing as long as you want. It is VERY sturdy. Frame printed with 50% infill adds a bit of weight. You could fill the slots with weights too, if you want- or even drill out the rod holes and use larger diameter, heavier rods. Weight is important for this rig if you wanna go big.
- Sliced off the "PCB Holder" text. Would you label a screwdriver "Screwdriver"? Haha.