M2 Tap for “chasing” the threads for the Upper Axle Height Setting grub Screw
https://www.micromark.com/Metric-Tap
M2.0x40 #82321T $12.**
Normally, you would also need a Clearance drill bit, (such as creating a new hole for a fixing screw on a Wheel; yet based on experience, it’s easier and faster just to buy a new rim!)
For the Slot.IT Uprights a Clearance Bit is Not Necessary.
Likewise – a pin vise, or a few wraps of tape, is all you need as a holder/driver for tapping plastic.
"... get on your bad motor scooter and ride!"
Sammy with Montrose