First layout I've tried for this. As the name implies, there was another arm doing a handoff in an earlier version that annoyed me. I can't see any obvious improvements after a day that don't involve serious redesign, which I might get around to doing, but probably not. The earlier version had only that one bottom right arm with period 8, but I couldn't figure out how to get it down to period 6, so I just optimized from there. Wouldn't be too surprised if someone's got a crazy period 4 machine, but that's beyond my paygrade. On the bright side, this is the first time I can recall using conditional logic, so that was fun.