Yup, DTC offers a lot of free services: flat repairs and air checks for anyone and rotations and rebalance for those that purchased tires from them. As for the plugs, the real issue is people not knowing how to use them properly. [MENTION=12380]phoebeisis[/MENTION] it sounds like you are one of the few people that does know how to use them properly. Rasp it just a couple of times then use glue. Most people probably rasp the hell out of it and bore out the hole until it's too big.