But don't tonearms all have their own specific spindle to pivot distance for installing them? Wouldn't that negate the effect of the size of the spindle since you're measuring from the center of it when installing a tonearm?
Yes, this is THE most important part of a turntable set-up. If you instal the tonearm at the incorrect spindle-pivot distance, it is impossible to get down to the minimum tracing distortion possible for that set up.
That's why investment in a proper alignment protractor e.g. Acoustical Systems Unitractor, Feickert, Clearaudio etc is de rigeur, if you are a serious analogue fan.
Tools needed
Spirit level - to level the turntable and platter before starting
Alignment protractor to check the spindle to pivot distance (esp if you are installing your own tonearm not the plinth)
Jewellers screwdrivers or small allen keys plus appropriate bolts and nuts
Small surgical clip to help attach leads to cartridge pins - much better than needle nose pliers - something like this
http://rover.ebay.com/rover/1/710-5...0001&campid=5338728743&icep_item=281331028547
Digital stylus scales
Alignment protractor again - to check tracing error with cartridge installed
Small mirror to check azimuth
Some decent light
NO alcohol e.g. wine, beer or gin and tonic - do that afterwards
OR ALTERNATIVELY
Buy a new cartridge from a proper UK stockist (i.e. not second hand or from overseas) and ask the dealer to instal it for you. I am sure that Graham from GT Audio, Paul from RFC etc would be delighted to instal any new cartridge purchased from them. That's part of the service and joy of going to a dealer with a proper premises and know-how.