Thinking over the setup and the design of the BMW factory one, I wonder why one couldn't just disconnect the hose off the reservoir cap and use that along with the syringe thing and hose and forget about the ezcon 1/2" pipe connector I used - or even the Mini-Stan in other models? Unless it is a very sharp barb on the cap it that makes removing the hose difficult.
Only thing that bothers me is I could see an air bubble getting trapped doing that, but the lower system reservoir seems to be designed so if there was an air bubble that gets in there, it exits via the vent hose as it is the high point? Maybe just loosen the cap a bit to let some fluid out along with any trapped air in the bleeding process? I dunno.
It's an odd system. That recessed area on the right side (first photo and beneath the white filler connector of mine) of the unit has two detent-like balls like used on some extension on a socket wrench. Might be an electrical connection too. Dunno. I don't think I want to try and press in on either of them.
Fwiw, the S1000RR system is maybe 1/5th the size of this thing. No servos though, and I guess that's what that large KAG motor is for on the underside of the GT unit.
Not familiar with the need for 6 bleeders either. Seems overkill. This thing looks like a bolt-together hodge-podge of stuff for $2,500.
The steel brake lines with plastic covering are interesting too. The plastic covering (?) only occurs on some
line bends though and not all. I don't know if those bends are just some plastic covering at those bends or if it is plastic only. Seems like it would not take the pressure and pop or leak out the ends. If the plastic were that strong, seems BMW would have used it for the entire line (since they love their $$$ plastic bits so much.).
I haven't seen this mentioned anywhere in the brake bleeding info that I've found, but plastic
turkey basters dissolve in a matter of time around DOT 4 brake fluid and get very gummy and sticky. Use glass
if you can find one and not plastic
I'm beginning to think this was a very dumb idea too. Web info has wrong circuits identified.