About 12yrs in the making Brandon.
My china gear motors finally showed up today, got one that is 55rpm & the other is 160rpm. Before taking apart the V1 tunnel grinder I checked the rpm with a 12v NiMH, it's 200rpm... starting with the 160 rpm g/m, a few more hrs fab work to do yet.
Made another vid this morning placing the gopro on the cab of the B50... the 30% faster pump didn't make a dramatic difference in speed, but I do notice it's a bit faster. What's most interesting is my run time on a 5amp pack dropped about 20%, 45-50min down to 35-40min. And also, when the pump slows down to its idle speed there's this sorta chirping sound, kinda like how a muffled diesel sounds on fast idle, it doesn't make that sound when motor/pump is running full speed & the previous pump never did it at all.
https://www.youtube.com/watch?v=6n3p95e-rFo