Hi Chris,your manners,politeness and apparent willingness to learn have prompted my response...no,i'm not after a dance partner [emoji144] but if you were going to invest a few quid in books,and good books ARE an investment,i can wholeheartedly recommend any by messrs Scaddan and Kitcher. Do not be tempted to believe that such books are only for use during the build up to a,say,an end of module test or similar,just having them about for reading generally,when bored,on lavvy or train,and you will be surprised when the information you will inevitably retain,will ooze back out. I have lost count of the times,what i have gleaned from a "bog-book",has gained myself a minor advantage on a job,or in a conversation...like the gent who wandered into the workshop i was working in,and bet that out of eight of us,no one knew what a "jim crow" was...not guessing that one of me favourite relaxing reads is a 1947 Buck and Hickman catalogue...:stooge_curly: