Wanted to split the braking system last weekend but I found out that I didn't get the right brake lever. There's no way to lock it in place and act as a handbrake. I can't do anything with this one since I'll have no other way to prevent the quad bike from rolling back when parked on a hill (no gearbox).
ALG Motoparts already came with a solution, they'll send me a new one as soon as possible and I won't even have to return the current one. Great service. But I'll have to wait a bit longer now before I can split the braking system.

I should still receive some parts from Rebbl as well. The enclosure for the controller didn't really have the correct size. The pass through holes for the orange cables were more oval than circular. Because of this the rubbers would not fit. I could've gotten the plates replaced for free but this would take several weeks. Instead I will now get cable glands to safely guide the orange cables through there. These would cover the holes just fine. I still need many of these for the battery boxes anyway, so I ordered some extra.
I'm also checking if I can get different plugs for the charge cable and the charging socket that will be on the quad bike itself. They said I would get red ones for these, instead I got blue ones. I also can't really use the one meant as a socket since this is just a regular plug and there's no way to easily mount it. I know that there are different ones that can be used for this and are easy to mount. Will have to wait and see if I can get them replaced.

Unfortunately I still haven't heard anything about the motor, already taking longer than the expected delivery time. Sent them another mail, hopefully I'll know more tomorrow why it's taking so long.

Meanwhile I did upgrade my workspace a bit. I finally have a way to store everything properly now. Starting to look like a real garage now.