it's your lucky day Nacho, (1) watch the game on TV as opposed to listening to it on the radio so you can see what a hand egg actually looks like (2) use a tight timing chain (3) reduce lower shaft axial play to .005" (4) twist the rotor lightly back & forth to see how much rotational play there is (4) with flat plates/slotted plate out, grab the shaft/lift it up the few thousands it will go & repeat for rotational play.