Been flying my CARF Joker with the Core today, the model was originally flown with my JR 28X, with 2 x 613BX receivers into a Mercury SRS.
I simply swapped the Rx's to 2 x PBR-26D (I'll do a neater wire layout now its on its intended Core system)
I used the same travels and expo from the 28X as they are both high output systems and it felt much the same in flight. I had my spotter look at the Rx performance flying away at distance and it was still showing around 90% in the worst orientation!

Dave