Well, I had ordered the Aluminum topped version of the WW from Cooltechnica, but I was sent the Poly topped version. It's not really a big deal to me, because I was torn between the two versions. Anyway, Im not sure which way to mount the Poly topped version of the block. The directions the block came with refer to the Aluminum topped version of the block, and make no mention of how to mount the Poly topped version. If someone could help me out here, that would be great.