You’d probably have some significant back room modifications to do as well with the pump station, solution delivery systems etc. Adding a second arch to your 360 is not likely a feasibly DIY project. If you want more impact/water impingement, you might just want to select a new nozzle set that will assist with that. There are plenty of operators on this forum that will know what sizes can do that for your machine. You’ll likely have to stick with your single arch, however, and continue to feed your low pressure solutions through that. The 360 should have some decent productivity/ bridge applied products and options that can expedite several cycles so you don’t even need to put some polishes, sealants and rinses through your main arch. I think I saw one set up that only used the arch for the presoaks and high pressure and maybe either the drying agent or spot free rinse. The triple foams, hot wax, ceramic and first rinse was all done via the bridge.