Has anyone run the big o xt? i'm looking at the 305's i have been running pro comp a/t for the past 3 yrs on both trucks. they have been great (around 48,000miles to date) but the warranty from big o seems hard to beet. the salesman said that basically if they get a hole too big to repair they will replace them for free, no questions asked. even if it's my fault. that seem's to good to be true any info would be great.