Spade rudder hung through the aft end of the cockpit. Keels missing the plate aft. Keels splayed more than the Mk2.
Rudder hung through the aft end of the cockpit supported by a skeg. (See K30 Charon of Styx photo in Review section). Keels missing the plate aft. Keels splayed more than the Mk2. Single backstay.
Rudder hung through the aft end of the cockpit supported by a skeg. (Example K30 Glasfor). Extra plates fitted to aft of keels. Single backstay although some were modified to twin.
Full Skeg rudder, rudder shaft fitted through aft cabin, extra plates added to aft end of keels. Some modifications to later boats included the engine access plate through the cockpit sole.
Taller mast and more ballast. Enclosed forecabin shelf. Dytiscus III was converted to an ‘s’ by Kingfisher Yachts.
Single masted Chinese rig designed by H.G.Hasler in 1978. As far as I’m aware none of these were produced.
As K30 Mk2 but a junk rigged schooner.