Try our new info resource - "Aladdin's Cave" (Main menu)Just added a separate link to Ash's Dropbox thread (shortcut)
My opinion is that although balancing makes a difference (mostly to slow running/tickover) it's quite alot street theatre for which people have consented to be charged money for.If the carbs are set-up well on a bench i.e. so that all the slides really do start to open together, then they are usually very close to being ideal with any obvious problems down to other factors like points/timing/valve clearance etc. This is why all the advice points you to verify those first before carb balancing.If you don't have any guages then you are not missing much if your general set-up work is accurate .