Its funny as you like. Did you know that Merry tiller did a "Wolseley Twin Six" Its a merry tiller on steroids and has 2 forward gears and reverse and as the name suggests it will do a whooping 6' that's 11 separate blades. All this driven with a 9HP briggs motor. I am ebay looking right now
Book ISBN 0-85236-301-x
Ali got from the library so I can not post on Sorry