The "stack of Bibles" folk just never had air where it's not supposed to be. As long as air is only in the lines downstream of the abs of course you can use the buddy system for bleeding. Brakes don't circulate the fluid there is only one line to each wheel so the fluid probably goes a couple inches back and forth under normal use.

I bought a pressure bleeder for the eventual swap of fluid. Turns out I'll need it for replacing my rear brake lines first. Glad I already had it on hand though.

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2011 E70 • N55 (me)
2012 E70 • N63 (wife)