Miryoku for Cheapino

I just built cheapino 3x5_3 split and of course need to get miryoku on it - there's a qmk branch here https://github.com/tompi/qmk_firmware/tree/cheapino but could not find the board over at miryoku.

It also has a special encoder, wondering how one could use it in the most meaningful way with miryoku....

Could someone describe the steps or create a miryoku config?