actually i wish i had something like the elbows, i was gonna order aeroflo replaecement drains, but i couldnt wait that long and i couldnt come up with a good solution, i too wanted a mutual drainage system, since i have the rez underneath, i needed something very wide and lucked out with 54gal rubbermades, they are short and wide enough to fit 5 fencposts, so i did what i normally do, i drill holes into my endcaps, one thing about those larger drains roots can and will get in there, just do yourself the favor and dont glue those joints, just for easier access, without realizing the drilled holes also serve as a pre-filter for large chunks atleast, may i make another recomendation, i see the sprayer manifold is very intricate in those pics, i and some others run one straight 1/2pvc line parralell to the tube and dril holes for the 1/4 poly spray lines from there, the pressure is excellent, you would think there wll be a drop off in performance but works great, but i found out fast when someone likes a system the way its designed they copy it, you know it works so good luck and keep posting, in all honesty im nrevous about pix, i dont even talk about my set up in detail since i have a"few"