I was inspired by the Motive Products power bleeders, but didn't want to pay that much for them, plus I like to tinker in my workshop, so I built my own:
The above pictures were taken during a pressure test with my new "universal" reservoir cap fitting. If bleeding, I would have a liter of brake fluid in the sprayer, and it would be pumped into the master cylinder reservoir under pressure. No real chance for the reservoir to go empty and introduce bubbles into the system.
The basic parts were a 2.5qt sprayer from True Value Hardware ($13), quick-release parts (~$10), pressure gauge (~$8), 1/4" ID vinyl tubing, some chain, and eye bolts from the hardware store. You could just use a tubing barb fitting rather than a quick-release fitting.
I already had the gasket material from a previous project. It is 1/8" sorbothane (very soft polyurethane). That was probably about $4 for 4"x4". I got that, the pressure gauge, and the quick-release parts from McMaster-Carr (mcmaster.com). I love that place. They sell everything you could imagine.
For the reservoir cap, I had some scrap 3/8" aluminum stock. 1/4" would probably work fine. MDF and HDPE (plastic cutting board) do not work well. The MDF makes it difficult to seal the 1/4 NPT fitting, and the HDPE was too flexible, breaking the seal at the reservoir. This 3/8" aluminum is some serious overkill, just my style. I tapped threads into the aluminum to get a nice seal with the quick-release fitting.
Last weekend I replaced the fluid in my Volvo V70 with this. Even single-handed what a piece of cake! Jacking up the car and removing tires is by far the slowest part of the job. Pump up to 15-20psi, bleed until new fluid comes out clean. Pump a bit more, next corner, etc. 1 liter did the V70. I wonder if a liter will do the LGT too.
I am alternating between ATE Super Blue and Typ 200. They are the same fluid but different colors, so it is easy to see when you have the old out.
Hopefully I can do my LGT tomorrow. Since this is so easy, I plan to do it about every year/15,000 miles. I'm coming up on 1 year and 15,000 miles.
If I didn't like to tinker in my shop and have quite a few tools, I would have just bought the "universal" Motive Products bleeder for $45ish, which is really a pretty good deal.