HI all, very excited to have purchased an old caravan(30 yrs) off ebay (as a spare room - cheaper than an extention!) - only trouble is it has a greased hitch and we have a dry (alko) tow ball (becasue of our previous newish caravan). My question is does it matter /are they differnt apart form the grease bit. We dont need to keep it 'dry' as we sold that caravan. Many thanks, Fi