[Walt Fricke]

Sellers of positive pressure, caliper up, bleeders assert that this is aeronautic practice. If true, that's a pretty decent endorsement.

Fact is, there are at least half a dozen ways of bleeding, each with some plusses and some minuses.

The promise of this one, if I understand it, is that (after emptying the system of all old fluid) you can be assured that when fluid reaches the reservoir, you will not have any air in the system. You can stop, top off, and be done. I've not seen their instruction sheets, but think this would involve, for each caliper pair/reservoir, pushing fluid from caliper A into the reservoir, and then pushing fluid from B there to be sure the air in the B only segment of the lines was removed. If this happens as a slug of air into the reservoir, followed by no more, this might work as advertised.

I tend to jump around depending. My major gripe with vacuum systems is that I can never be sure when I have gotten all the air out, because some gets in around the bleeded, only to get promptly sucked out. Doesn't cause problems down the line, but I am not sure when the air I am after has been removed. After a while I just assume it has been, and that has proven a justified assumption.