When hooking up my last two (of six) arches using 5V WS2811 strips, if I plug in either strip directly into the waterproof connector of the extension cable from the E682 controller, the strip works correctly. However, when I plug another strip into the first strip, the second strip doesn't do anything. As a troubleshooting tool, I swapped strips and got the same result. I am honestly tired of fooling around with these for this year and have decided to just set these to the side this season; very frustrated at this point. I measured voltages at + power, - power, and data signal. I saw 4.93 V + to - and about 0.785 V data signal on the input end of the second strip in each case. Based on some troubleshooting I did last weekend when I found a bad extension cable though, not even sure the voltages are really telling me much!! Last weekend I was seeing good voltages but was not getting correct response from strips. When I replaced the cable everything was good... I think for troubleshooting I will plug the strips directly into the controller without the extension cable to see if that makes any difference--with the strips in series the way I need to configure them. I did check my E682's browser to make sure I didn't goof up the number of pixels; that is good--no problem there. Thanks in advance for whatever ideas you can give me!! This is the shortest of my three extension cables, so I don't think length is the problem.