yeas astronut, it's not your fault, it was me who posted the pic of the alt tension bolt... I'm still a newb so get my alt az tension thingies confised... I think the "tension" part is what confused me, i've never adjusted the az tension nut so the fitst 'tension' thing that came to mind was the break tension bolt...
I'll have a look at the correct bolt next time i have a chance..... Apologies for causing all the confusion!
