Re -76: The book says, "the nosewheel does not self centre after lift off if it has swiveled about 180° just before lift off. If retracted in this position, the nosewheel jams in the up position, and normal extension is not possible. If the nosewheel is swiveled more than 90°, a slight forward movement is recommended before lift off".
That seems to suggest it will self centre at 90° or less. Never tried it, always ensured it was in the correct position by a taxi forward if in doubt. Only time had the nosewheel jam up was when the oleo didn't extend on lift off, jammed against the hydraulic jack, and bent it in the process. And it has a shimmy damper.