Hello, I bought 2 Radion XR15's for my RSR 250 and I was originally going to go with a Multi-Light RMS Track and span the tank length wise with the RMS arms. I already bought a Multi-Light RMS Arm Kit but now I want to switch to two individual light kits mounted seperately with a kit for each Radion mounted from the back of the tank. My question is: can I keep the RMS Arm Kit and piece together parts for this new scenario that I want? Can I use two RMS Slides for XR15's and then short extension rails? What size rails would I need or should I return the Arm Kit and start over? Can I still return the Arm Kit purchased 8/4/17?