Orc tools
A jig to position the mountpoints for a flat mount caliper (intended for a rear chainstay, but maybe it would work on a fork as well? I suspect it won’t, given the way disc caliper mounting standards are, but eventually I’ll come within measuring distance of one and see what it tells me) that I reverse-engineered based on how a flat mount caliper attaches to a disc rotor.
I can attach a flat mount caliper to it, so it’s not too far off. Tomorrow I’ll use it to help me glue a set of mountpoints to the rear triangle of the travel bike and see if the execution is good or a horrible bodge.