One more question Box Gods, if I was to drill and tap a hole in the top of the res for a fill port would this effect the efficiency of the res in anyway? I wouldn't think so, but I thought I would check before doing so.
Thanks.

Also, thanks for all the hard work in bringing some really interesting and innovative products to water cooling. I definitely am interested to see what you do with rads and blocks. A completely new design, in my opinion, would be a welcome change.
Thank you again.