Sorry chaps…thats not what i meant…btw, i have used palms on many occasions in the past…and in the last 2 years…anyway…what i meant was Franglais said that they could be fitted/connected wrongly…what i meant to say or be understood was the fact we have two seperate airlines…a red and a yellow…so just put palms on the end of them…and also on the trailer obviously…i was thinking of the old boy who is having problems…so if he keeps the same trailer its not a problem…as he or the company can convert…but its gonna be expensive if every unit has to carry adaptors and its a big company…i`ll leave it there …sorry for the confusion.