When mounting the block I found that the lug nuts on the back side of the card on one of the holes does not become flush with the card since there is a resistor in the way. I find it ironic that a block that is specifically designed for GeForce3s can't be mounted on a GeForce3 that is the same as the reference design. Here's a pic of what I'm talking about.
(Courtesy X-bit Labs)
I've already emailed them about the problem but I wanted to get it out to the public before people buy more of them.