You are very correct Steel 3:1 is what you have. I will clarify a bit more and say that you have the 58mm shafts as well. There are two shaft lengths, 48 and 58mm (aka short and long). For motors the 360 motors look very promising. I have been wanting to test them but I'm dying for spare time these days. Every time a new release (or two) comes out I have to make sure everything goes smooth so it takes a lot of my time. I'm sure you can see my lack of posts and videos too I'm making sure instructions are done correctly, manuals, a new catalog (50+ pages!!!), handling the websites, and much more.
I still have the ones Max-U52 sent me and do plan on testing them at some point, I'm just dying for time atm. Even my weekends have been slammed lately with other stuff. I have a bunch of side projects going on outside of work that are paused as well. I just got a new camera and trust me, I'm dying to use it! When I get some free time I'll get back to some videos and such, the 360 motors are at the top of my list actually. I was going to test the water pump part of it as well, I just need to get some extra 1/4" tubing.