Good luck with your tubing system. I made a lot of mistakes the first year trying to conserve, and using my own ideas.
Second years I changed most of it back to more conventional. I had some "y's" in the drops, some drops to short and did not have a good way to tighten the system. I just took out some drops yesterday that were a little on the short side. All the new ones are now 30 inch. I used the Leader max flow for drop lines. I like the extra flexibility compared to the stiff 30P drops. I did come up with a design to allow the main lines (5/16) tight.
Regards,
Chris