hello to all,picked up our new ob expanda just b4 xmas. self employed so cant go far at moment had 4 days @ kingston pk and 3 days @ west beach right on beachfront was fantastic. tow vechile has been in family 4 10yrs but have a rediculous situation with 150 ball weight 300tdi,can tow up to 3500kg tho ..work that out? has anyone had same prob?