Yeah, I did something similar, but just some Zurn 3/4" hosebarb brass globe valves. If you look down the opening of these guys when open, there is no restriction at all. Then all I have to do is blip a few bubbles into the reservoir and I'm off and running again.
This also allows me to pull the entire loop away from the case when switching out blocks. Me and spilling go hand in hand...so over the workbench is much better than over the MB.
Now I just need to work on a techstation or horizontal case someday.....:D
http://img377.imageshack.us/img377/5...testingmm5.jpg