My TH is 2 months old now with OE "BlowMax" tires. I've put approximately 3,000 miles on them. I keep them aired to the 85 psi rating and check them often. I've very careful not to scrub or c...
If it were me, I would keep a close eye on them and run them for a while. If you continue to put 1500 miles per month on them, keep a very close eye on them, and do what you're already doing. But that's just my opinion, and I seem to be in the minority on this. YMMV.