I used the RM twin keels to replace a set of MR twins in a 4 channel 6’5” twin pin. I really liked the board with the MR twins. It was fast and responsive. BUT, I wanted to try the RM keels and now I love the board. It has increased the drive, still fast and responsive but with more glide and control. I’ve been riding it on beach breaks and yet to try it at a point break.