Im about to install the full JCW brake set on my ‘14 Cooper S. I have the oem 18” 10 spoke wheels. I’ll be running 20mm spacers. However......I’d like to change wheels to the Rota RKR 18” 8 spokes. I figure I’ll need the maximum backspace offered of et42. Has anyone used these? Anyone used Rota wheels? These wheels are also 8” wide. Will this be an issue? Any advice appreciated.