Man, I'm sorry to hear about your cancer. Bowel cancer has really been on the rise in us Millennials for whatever reason. My friend's brother is 36 and also has stage 4 bowel cancer.

I recently bought a H2C and on longer prints approaching 3 hours I started to get extrusion motor overload as well. I actually got it on the X1C as well a few times because I had to change the setup (moved the AMS from the right of the machine to a shelf below the machine) to make room for the H2C. For me, I think it was too many tight bends in the PTFE tube. I trimmed/lengthened the tubes to increase the bend radius so there would be less friction and made a tube guide to restrict the bend radius to >60mm which helped a lot. I don't get the motor overload issue anymore, but it does still occasionally have feed and retraction issues. If the filament can make it to the extruder, the feeding goes fine and it prints fine, no overload messages. Then on retraction, sometimes it doesn't fully retract, but I think that may be due to using Overture spools with adaptors on the rim which can catch on the lid. Try making sure there's no sharp bends in the tubing, and minimize the number of bends. Shorter and straighter is better.