Ah yeah, once again the obvious escapes me. lol
In any case, I still think permanently mod'ing the Enthoo reservoir bracket is the most practical solution, so in the absence of any advice as to why I shouldn't do that, I think that's the route I'm going to go. Just have to figure out if I can find a pro shop to do it for me or pick up a dremel and try my luck.
And I had *SO* hoped to have a fully watercooled system up and running this weekend. It's always something, right?