The biggest issue for me with the S1 is that MMC dont seem to be supporting the spares for it and you can have to wait for several months for certain items. I have lost two wheel due to grub screw issues and gone through numerous batteries - replace every 2 years now! Other than that its a great car!
It’s interesting I do wonder if differing storage causes issues, I have had no battery issues..
Regarding wheels if the grub screws are in they cannot come off, but if not in correctly or if damaged or not matched to the correct hub you are in for a world of pain..
