Not interested. It's not a drum swap. Since it's a one-way up only windlass, you'd have to replace the whole thing, which means major surgery in the anchor locker.
Plus, having chartered and borrowed boats with both all chain and rope rode, I am much happier with rope for a boat my size.
I'm open to comments on my original proposal.
Actually, this is done to recover tandem anchors. A recovery line is run from the secondary anchor to just before the primary, which is generally all chain and recovered with a windlass. Once the primary is in the rollers, the recovery line is taken to a winch or capstan and the secondary is recovered. It is NOT a trip line and MUST be attached to the anchor shackle, not the end of the chain leader.
It works better if this line floats (less fouling), but no float and not much slack. So yeah, attach it to the anchor shackle and the chain (rolling hitch) with little slack.