Another bit: you aren't necessarily stuck with the setting behind the patch panel when you opt to change a jumper. Have a look at the 'Switch' or 'Expander' modules @ 4hp and down, and you'll see that a number of modules exist as 'assignable' switches, meaning that they can be connected to the jumper point and then you actually have options as to whether you want the 'jumper on' or 'jumper off' (or 'jumper in X position' or 'Y position') and have this option switchable from one of these little auxiliary modules. It's a cheap and space-thrifty way to up the game on some modules where jumper setting changes are possible.