Surely you just eventually know what tunes go together in your record box as far as key is concerned. Technimatics Desire Paths is so fucking quiet and I have a shite old mixer anyway so I get so stressed out when I cue it and forget not to turn it up loads.With 33s too the pitch response is a bit less precise I feel, copying Frictions Leave with Night Vision is a pain on 2 33rpm bits of wax!!!