Siyi products and Pixhawk

I have seen in past Pixhawk diagrams the use of Siyi MK15 radios and receivers connected to Pixhawk products. Therefore this encourages me to buy a Siyi FT24 radio ground station, Siyi FR receiver and the FM 30 extended range radio for my Pixhawk 6C . The final result was that there was no documentation that showed this setup. Has anyone out there attempted the same, with good results or should I switch brands again. It seems like there is very little documentation for many of the new high range systems.