Ball wheel (big and small) and voltage converter holder

thingiverse

Ball wheel serves as a viable substitute for the traditional metal counterpart. Print at maximum printer quality to ensure optimal results. The ball is securely fastened to the case from the bottom, necessitating a small hole drilled from the opposite side to facilitate its release. If the ball fails to move, drilling a small hole into it and employing a screwdriver can force its mobility. To minimize friction, sand the ball and apply heat using a lighter to polish its surface. In situations where larger ball wheels falter in their performance, a smaller counterpart may prove beneficial. Voltage converters offer an alternative solution to diodes, as seen on online marketplaces such as Banggood, where products like the 5V-3A UBEC with support for up to 2.6S lipo batteries are available.