Thoughts on a Under Gravel Return Design

Other than the siphon problem (which was just stupid on my part), I am pleased with the design so far. $15 in parts and about 1 hour to assemble. No glue used.

I get a very even flow. Can't tell where the holes are drilled.
 
whats a RUGF?
I know what UGF is.... but not RUGF?!
 
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