[woodcote]

The Thunderslot tyres are notoriously difficult to true and most people don’t bother. The NSR ultras are okay in my experience - and definitely need truing. I’m using 400 or 600 grit paper glued flat on the mdf plate of my DIY truer, with the tyres powered by the car at 12 volts. That means it’s very gentle pressure for 5 seconds on the paper and then lift... That’s needed to protect the motor, but it’s helping the tyres also. I don’t use any liquid, I just go very gently and patiently.