I bought this tool and even tried.
The greatest disadvantage is that, on the cover, where the transparent tube passes through the lid, which is screwed to the brake fluid container does not do the rubber seal tightly.
I have the bottle filled, connected to the brake fluid reservoir. The air hose connected to a tire, max 1.4 bar. Went to the caliper rear right and have the bleed screw open. The brake fluid ran out very slowly.
Again and again I looked at the bottle to whether there was liquid in it.
After some time I noticed a puddle on the floor, it was fluid ran out of the cover. I built the lid again and tried to make things a little harder, but it did not.
So I pinched off the air supply and made it the old fashioned way.
With a second person, brake pedal, screw on, screw on, release the brake pedal, etc ...
Which reminds me, the bottle has however helped because the brake fluid is run without air pressure in the container.
Tomorrow is another fluid to change. I'll try the place to get close and try again.
Conclusion: The idea is great, only should it somehow get tight. I would buy it again.
