I've just moded the first cube with Mark's brackets. It works great and the point with the screws to keep and to reuse is easy to find.
Some pics of my mod :
http://imgur.com/a/poykkSlightly better temp of the ASIC, but the major improvement is the temps of the DC/DC converters. I use the Enzotech BMR-C1 for these.
Feel free to use the pics if you want to do a step by step how-to
