Steve - You don't really need double cages for double straps. I don't think they make any difference at all as those MKS straps you have don't stretch or twist anyway.
@zouo started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
Steve - You don't really need double cages for double straps. I don't think they make any difference at all as those MKS straps you have don't stretch or twist anyway.