The thing that matters is the space you want between screws/axles, most spacers are .25, .50, and .75 inches long, there’s also the 1inch spacer.
Yes, size matters, if you need a .75 inch spacer, but you don’t have it, use either a .50 and a .25, or use 3 .25 inch spacers (it’s recommended use the bigger spacers for big spacers, to save small ones when needed for a small space.)
If this doesn’t help, buy more spacers here, they’re relatively cheap.
Ok thank you so much! This will help me move forward with my build and with other parts:).
And just curious; what do you want to make for your robot design? I might give you some useful tips.
I am using the basic model. I used the Axel directions to build it. If you have any tips that would be great!!