So, I finally got around to start doing the conversion. As mentioned earlier I bought some hpk brembos for mts1200 expecting these would bolt right up without complications. Unfortunately, there was a slight case of interference on the inside of every rotor towards the caliper. It's real minor, but still noticeable. Bike could probably be used like this even though not fully correct.
I tried some 2 mm shims I had nearby, between caliper and mount, but these were too big and actually caused the buttons to interfere with the caliper ---> way bad.
I will make some 0.5 mm shims and check fitment. I think this will ok.
I will get back with result. So stoked about this conversion.