A pipetting system having a plurality of fittings whose spacing can be individually adjusted by sliding the fittings along a track. Changing the spacing is accomplished by releasing a clamping plate which secures the fittings to the track. The fittings are then slid into the desired position and reclamped....http://www.google.ca/patents/US5057281?utm_source=gb-gplus-sharePatent US5057281 - Adjustable multi-channel pipetter
