It pisses me off when people defend this POS aluminum top that should have been pulled off the shelves after the FIRST reported failure from corrosion. I bought a number of these blocks and read the papers that shipped with the first batch and I saw nothing about having to use Hydrx or it would void my warranty. But my gut told me to toss that aluminum top in the trash....so I got the copper tops when they FIRST came out. In fact I preordered direct from Swiftech before they had shipped to any other vendor. It's no surprise that the tops fail...and if someone wants to use an additive just so they can use them that's their choice. Once I used my last copper top I no longer even considered purchasing the GTX...it just made no economic sense.

I use Swiftech stuff a lot. I give props to them for continuously innovating...but the GTX and Stealth should have been mothballed a year ago.