I feel like this should have been one of my first questions now that mine's almost done, but to raise the playfield do you guys pull back towards the front and flip up on the little thin sheets of plywood glued to the inside of the cabinet, then use the arm? It seems incredibly unstable. What about flipping up to work on something like the pop-bumper coils? I've also not figured out what the point is of the multiple steps in those same plywood pieces glued to the cabinet are for.