Re: Ludwig atlas mount for bass drum
A cymbal arm is slightly different, in that it is typically positioned vertically, and with the cymbal mounted/balanced at the top, it doesn't cantilever like a tom does. The cymbal's energy doesn't torque the mount as much. But, I would still use two mounts opposite each other on the batter and reso side, with an "accessory rod" between them, and mount the cymbal from that.
I know, that's some extra pieces buy, but I'd prefer to split the torque between two mounts.
I have some older kits with P-1216-D classic mounts, and a 3/8" L-arm, and they work fine for me. I love the Atlas mounts for toms, but I don't use them elsewhere.