tow ball fitting to Autotrail tow bar

Just a heads up for all you  D I Y people , who are thinking of bunging a tow ball on your tow ba ( if fitted ) the two ready made holes for the ball are plastic coated inside the holes ,making them too tight for the bolts ,so need filing out , and the standard bolts for the tow ball are not going to be long enough .you will need to sause new bolts at an aproximate price of £6.00 for the pair the wiring and socket should be located in the old spair wheel locker on the right side . hope you find this helpfull.