Just hoping that someone can comment on my shopping list. I think I have worked out the components I need. I intend to build a 2.5m 12 branch 2D mega tree using conduit and WS2812B LED strip. (may expand to 16 branches) 6 x WS2812B LED Strip 5mtr http://www.aliexpress.com/store/product/BLACK-PCB-5m-DC5V-WS2812B-led-pixel-srip-IP68-30pcs-WS2812B-M-with-30pixels-waterproof-in/701799_1846623152.html 12 x pigtails http://www.aliexpress.com/item/10pcs-lot-3-Core-BLACK-Waterproof-pigtail-20cm-long-each-male-and-female-male-connector-s/1019853359.html 6 x T - cables for power injection http://www.aliexpress.com/store/product/3-core-T-type-waterproof-splitter-the-middle-is-2core-BLACK-color-the-male-connect-s/701799_1707253215.html 2 x 5v 400w power supplies http://www.aliexpress.com/store/product/5V-400W-rain-proof-switch-mode-Power-Supply-AC120V-or-AC230V-input-DC5V-output/701799_1750594048.html 1 x ECG-P2-2 controller http://www.j1sys.com/ecg-p2/ I have chosen 2 x 400 watt power supplies given the pixel strings are 30LED/m = 14.4w Thus 14.4 x 2.5 x 12 = 432. To be safe use only 80% capacity so I would need a 540w power supply. It would seem better to get 2 x 400w and I could add another 4 strings and go to 16 branches if I wanted. The controller, I have 30x2.5x12 = 900 pixels / 170 = 6 universes required. The P2 should give me 2 connectors with the capacity for 4 universes each, again should be OK for this project and again able to go to 16 should I wish to expand. I also considered the Pixelite 4, this would seem an attractive option, but costs a little more. Is my logic OK, or is there an error in my thinking? I have seen the odd comment that the P2 can be a little sluggish? Am I better with the Pixelite 4? Any suggestions appreciated. Daryl.