RadioPopper JrX Sticker & Velcro Mount solution
I have 2 RadioPopper JrX studio transmitters, and 4 RadioPopper JrX studio receivers. One problem I often run into is keeping track of group A, B, and C. I bought some stickers from Walmart and cut out little rectangles of solid colors from the stickers and attached to the underside of each dial on the transmitter. I have 2 transmitters, so I only put stickers on my "master" transmitter. The other transmitter would be the "assistant transmitter" and I have "enable level updates" disabled so my 2nd transmitter does not effect the levels of the flashes. I attached another sticker on each receiver so I can easily see which receiver goes with which dial. On the RPCube, I added velcro to both sides (the sides that don't have the 3.5mm jack and the phone jack). I also have velcro on the back of each transmitter. The reason I put 2 strips of velcro on the RPCubes, is because sometimes my lightstand mount gets in the way of velcroing the receiver to the RPcube. With velcro on both sides, I can easily choose the side that works better. Keeping the receiver velcroed to the RPcube makes the connection with the 3.5mm cable much more reliable.
Strobist Info: You can see the setup in the photo of the comments. Or view the behind the scenes here: www.flickr.com/photos/louish/4924496460/in/photostream/
580ex ii on left and 580ex ii on right, both difused with an umbrella at 1/2 power.
Canon 5D Mark II, 50mm 1.2 @ f/16, ISO 1000, 1/200 sec