No, nothing is standard, I designed and built it myself. It was quite difficult since there are no reference surfaces. It was cut and try until it fit. Unfortunately the disk caliper I chose does not conform to the IC dimension standard. I wasn't aware of the standard when I started development. I bought a Shimano hydraulic caliper and found to my dismay it didn't fit. Consequently, I tore it all up and started again, this time using the standard post mount. More pictures to follow soon.