The newer versions of the Gilson Pipetman P2 and P10 Both Pipetman P and Neo (NOTE: Neos have been given the suffix-letter "N" to indicate the model difference as well as lighter plunger force, overall lighter weight, a wider volume range in some models, and a color ring on the outside of the plunger) have a feature you may not be aware of, OR you may think your Pipetman can't properly eject or accept certain sized tips.
Well this instructable may clear up any confusion! You see, Gilson has redesigned the P2 and P10 with a "Dual position Adapter" on these two models which allows you to use long and short tips!
Read on weary lab bench warrior!
Step 1: The Gilson P2 and P10 (or P2N and P10N)
Both P2 and P10 models are very similar in terms of outward appearance. Look at the handles, no difference. Pipetman Neo's are given the suffix letter "N" to their original Pipetman model names. The very end of the (shaft) tip ejector is slightly different, however. P2 is more pointed than the P10.