im pretty sure you have to use the brake that comes with it because it has that weird and specieal way to brake or whatever. not 100% but im pretty sure.
its kind of like a slide in sort of thing, you bolt the brake to a mechanism that looks like a dropout saver, then you just bolt ur wheels on the the part that looks like a dropout savrer
just buy a pheonix brake drill a hole in your deck and then either still put in the like brake frame and then put your spacers in or watever or just get bigger spacer