I am considering converting my mega tree into an RGB tree next year. I was going to buy 30 strings of Ray Wu's 50 count pixels. I understand I can connect 3 of them together in one universe or output on the ECG-P12R. The data and clock lines can pass through on each string however power needs to be injected on every string. The issue I am having is that the power can only flow in the same direction as the data correct? If I have three strings connected on a mega tree that would mean a string would start at the bottom and end at the top. It would be connected to the start of the next string at the top and travel to the bottom where it would connect with the third string. The problem is for string 1 I need to inject power at the bottom of the tree and for string 2 I need to inject power 16 feet up at the top of the tree correct? I will probably need two power supplies anyway so I suppose I could mount one toward the top of the tree and the other at the bottom. I was trying to avoid adding complexity at the top where it it hard to reach and troubleshoot should something go awry. With DC you can't power a string backwards like you could with AC correct? I would not be able to add power at the end of a string 2 and have it flow backwards would I?