Rope and Pulley eveners

Does anyone else use a rope and pulley hitch for multiple tandem hitches? We use them and they work great. White Horse and Pioneer are both manufacturing them now. They upgraded the pulleys and now use singletree hooks instead of snaps so they have made some good improvements. I am going to buy a new set for 6 this winter. They have provisions for hitching up to 12 but I don’t understand their sketch in the book. Hitching 4+4+4 it requires different hardware for the wheel team but would have to see it to understand. The pictures from HPD don’t show it close enough to see how they rigged it so it equalizes all three teams. Hitching only two teams of 3 or 4 is easy but when you add the third I don’t know. We may put a 12 together at our spring plowdays but maybe we’ll have to do it conventionally with eveners. We use 6 alot and 8 sometimes so it may not be cost effective to buy the extra rigging for the rope hitch for a once a year gig.