[Everett33]

The chain-in-tube used 4x 16t #25 hubbed sprockets. This took much more finesse to assemble due to there being many acetal spacers between the sprockets. With the pulleys, I can just drop the assembly into the tube and add the 1/16" spacers to take up the tubing wall thickness when I install the plastic bearing blocks. If I use the 221 Robotics 17t double #25 sprockets it would help some, but the belts would still be much easier to assemble.