Before you try to start talking shit, they invented this thing called www.Google.com a couple years back. You should check it out next time before you try to call people out.
You cannot believe everything you read as a result of a google search. I too am still trying to find out the exact size of a GT500 TB and I now have 4 different sizes thanks to google and this thread. BTW my BBK is a dual 62mm.
Is this still up for sale and the GT500 TB is a dual 60mm and they have dynod it with the bbk and they both put down same numbers. This is information from a guy at BBR. So if it's up for sale at $125 I'm defiently interested.