Jatco's Trillogy system uses a similar winch system (although it's side-loading, not a rotating version), and can be adjusted to deal with a short swim platform. (Ours is set up so the First Mutt and I can walk between dinghy and transom.) Also has options for additional bracing, to increase weight limits. Not as "easily removable" especially if additional bracing is installed -- but much of it can be removed, as in for the fishing season. I load our Walker Bay Genesis essentially almost one-handed, i.e., with the winch.
-Chris