I'm not sure how he's got his, I can't tell if the ride's on a separate arm or if it's just set really low and to the middle on that right leg mount.
At any rate, I've got my ride and my splash on separate arms. For the ride, I'm using a clamp from my old Roland TD-6 kit and an extra arm from my Alesis DM10 kit. My splash is on another spare arm from the DM10 and a spare Strike clamp that I picked up from someone on Facebook.
I can't use the leg mount on that side because of where my 4th rack tom is placed, so I had to get creative. I have a stand, but I use it to mount the GoPro for gigs, and I really wanted to try to keep everything confined to the rack at the moment.
I've posted some pics below.
--
Shawn