If you plan on taking your 3D printed droid to events, driving him around outdoors, or basically doing anything beyond leaving him within the safe confines of your home, there are several modifications you should consider that will dramatically improve the durability of your droid.

Center Leg
1. Steel ankle joint - Use 5/16” threaded rod cut to about 2.25” or 60mm. Use a Dremel or rotary tool to carve slots in the end so you can insert/remove using a Philips head screwdriver.
2. Vex omniwheels - Newer design and detailed parts list is available on the Patreon file share. This is an expensive mod, but I feel it’s worth the investment.

Main Feet:
1. Steel ankle joint - Use a 110mm M12 socket cap, partially threaded bolt cut down to 80mm (https://www.mcmaster.com/screws/socke...)
2. Vex omniwheels for drives - I used the Hans Bekaert files available on the Baddeley file share within each Drive subfolder. Parts and instructions are available there.
3. Tim Hebel Metal flange motor gear - Uses these flanges: https://www.amazon.com/dp/B08335MYGW.

UPDATE: There is an additional upgrade option available for mounting the gear to the motor shaft - sonic hubs. This modification was also developed by Tim and is available in his mods folder in the Baddeley file share.

4. Tim Hebel Hollow center axle - Uses a 40mm M3 bolt. Details in the instructions in the file share.
5. Steel Main drive wheel axle - Uses an M8 steel rod (https://www.amazon.com/Linear-Motion-...) and lock collars (https://www.amazon.com/dp/B08SK2LNNV). Steel rod should be cut to about 105-110mm in length. Use these inserts to fill the gaps on the drive housing: https://www.printables.com/model/2511...