Using this vw-audi-brake-bleeder-tool.
This is the guide I was following to do the flush. It recommends 30 PSI, and the bleeder held 30 psi just find when I tested it before connecting to my reservoir.
MK7/7.5 GTI Brake System Flush DIY
I'm dumb and left the brake fluid reservoir cap on when I compressed my brake pistons during a pad install. Now there's a slight crack in my reservoir that leaks when I get above 3 psi (well below the 30 psi needed for a brake fluid replacement). I've ordered a used reservoir but am having no...