Ok quick update ,got my first pam 183h and all good apart from the strap bars ,2 of the bars would wobble and screws not lock,so after some investigating i decided to purchase a set of mini taps/dies(£15 ebay).Just cleaned the thread on the screws and still not locking ,so then tapped the case again and all is good .I am now a happy bunny,by the way the thread size is 1.5 mm for the screws i think, number 15 on the tread plate.
cheers
cheers
