I use the Motive 1118 adapter with the thick rubber washer. you are right the guide is a mess, they recommend the 1118 over the plastic one for the Fords (i have both)
make sure you pump the system up to ~15 PSI and let sit for 10 min without fluid in the bottle, this is to make sure the cap isn't leaking (1-2 psi in that time is fine) if it is leaking try again. if you pump up the system with fluid and it is leaking, it will fill the fluid reservoir with brake fluid and it is a mess when you take it apart as fluid will go everywhere.
This process seems to work well for me, i change fluid before each track event. I usually go once in the spring and once in the fall.
make sure you pump the system up to ~15 PSI and let sit for 10 min without fluid in the bottle, this is to make sure the cap isn't leaking (1-2 psi in that time is fine) if it is leaking try again. if you pump up the system with fluid and it is leaking, it will fill the fluid reservoir with brake fluid and it is a mess when you take it apart as fluid will go everywhere.
This process seems to work well for me, i change fluid before each track event. I usually go once in the spring and once in the fall.
DEss