RolandJ, I've had my HTT 62/12 on for a couple years and so far it has performed great. No complaints with it. Please give your original vendor and HTT a chance to see if they can make things right by you. I've learned over the years that if you are nice but persistent, people will usually be fair. I don't want to insult you but don't expect something free on something that is out of the normal warranty. But if you give them a chance, I would expect some sort of help with the cost because you didn't get expected life out of the product. I've ordered a lot of stuff from Rip Rook, at Source Automotive, the last 3 years and he has bent over backwards to take care of me when something wasn't right. One example was, my old Dipricol isolator finally failed. I ordered a new updated one from Rip. I put it in and everything was fine. Two days later the fuel gauge wasn't responding again. I pulled the new isolator off and found the diaphragm was bad in it. I called Rip and he sent a new one over night with a return for the old one, no questions asked. He didn't design it, he didn't build it, but he took care of his customer that he sold it to. Give your vendor a chance and he can put pressure on the manufacturer. I hope this helps.
Regards, Mike.