Would a Redline Monocog be too heavy for SSCX (50 year-old legs), if the goal is just to finish and have a good time? At that price point, my options seem to be a formerly high-end used canti SSCX rig I'd never feel comfortable riding off the track at speed in Seattle, or something like this, which i could also ride around the neighborhood, to the store, on trails, etc. But I'm assuming it's as much of a pig as the old rim brake monocogs, which were 30ish pounds, as I recall.

Or should I just wait to find an RXS or some other disc-equipped single-speed come up on CL?