Hi, I have a problem in that the metal lug at the back of the hardtop will not come out of the hole. I can only lift the hardtop up an inch but the back bit wont disconnect. I have had two before so I know it is not that I have placed the release levers wrong. Any help on how do I get the hardtop to lift out without taking out the petrol tank to geet to the switch? Appreciated, thanks