Thank you for the advice. Will follow it. Have buddies who could show me a few things, assuming that some Gate Agents will let me onto the plane without my name on the (working) crew list for the flight.
One mistake before the 757 tng. years ago was not planning ahead before tng. with jumpseat rides/hand on FMC/MCP. Forgetting the Boeing stuff, in order to have an open mind, might be difficult.