pic: Modular Gearbox

[Ari423]

Originally Posted by Chris is me

One more thing I want to remind you (and sorry to dominate the posts of this thread!) is that you want to make sure all of the tubing sizes you're using are readily commercially available. For example, .100 wall tubing is very uncommon outside of what Vex sells; most of it is 1/8" wall and 1/16" wall. Also, some of the odder sizes are only available in 6063 tubing, which, albeit weaker and shittier to machine, it is adequate for this application in 1/8" wall if there isn't a 6061 alternative.

I don't mind your help at all! I thought 100 wall tubing was a common size but it seems I am mistaken. Also, I couldn't find any 3/4x6" tubing of any wall thickness so I changed the double block to 1x6x125". I can find that on McMaster, if not somewhere else cheaper. It makes the 2 CIM gearbox a little bit heavier and wider, but only slightly (.25" wider, .18 lbs heavier).