i have a new metzler m-1 i have about 300 miles on them and i got a nail stuck in it as you know i would have to buy a new tire and pay for install tire-about 130 rear about 60 to put on for a new one the local shop says they can just patch it and it would be all good but i don't think its very safe he says he does it all the time. how about some input from you guys ?