Anyone getting a better power supply to try to fix the ZGemma problems driving motors - although we don't supply Zgemmas. I've recommended getting 12v 5A PSUs to customers who've bought them & had issues driving motors, but I've heard reports that it didn't fix it or only did short term- can't say for sure as I've not bench tested them here. I think the connector's slightly different than most use btw, it's either 2.1mm or 2.5mm - they look the same at first glance but if they do fit, they will be loose so maybe that's one reason why it didn't seem to cure the issue for some. Some PSUs come with 2.1 2,5 adapters.
Try to get a good quality 12v5A PSU rather than the cheapest, used to carry loads of decent ones in dm800 days. They will almost all be switch mode PSUs btw- linear PSUs usually cost a lot more, you can tell which is linear, they're a lot bigger & heavier.
If you want the motor to go faster go to a channel on Horizontal - it puts the motor on 18v & drives faster, probably what some E2 coders have done.