The air-cooled VW brake fluid reservoir. This may be the problem you didn't know you had

I put a transmission and engine in this. All brake parts were already new including the new aftermarket disc in front. The car came to me with this done prior by another unknown mechanic. After the trans and engine were in, I couldn't get any pedal while bleeding. I decided to ck adjustment at the front but while jacking up the front I thought ... about the subject of this video. So I looked. Sure enough there was the misrouted reservoir to master cylinder hose. Cleaning up another mess. I knew this was likely the problem at this point because everything else was new so I thought this has probably been messed with too. Intellectually, this is a "you just go like this and it'll be fine " repair. But it's really the only part on the car where you have to be an engineer or physicist to know how to put it on or you've actually seen the actual physical reason it has to be installed in a very specific way. I got lucky with that part, as I mention this video.
If the pipe was NOS, it would have the perfect length and bend; installable by sliding it through the body attached to the reservoir. Because I had to determine the proper bend and length, the tank must come out for access. After I got the pipe to fit, it could actually be installed while connected to the reservoir and be slid through the body and onto the master with the tank in with no distortion to the pipe.
If putting a two circuit master in single circuit car, use original reservoir and it's feed pipe for the inlet of the y piece and match the outlets for the plastic pipes on the master. You'll need to braze this. Brazing is undoable so you can make mistakes and undo them without having to replace the pipes because they're welded.
Above all, the y has to cooperate with the hose routing to achieve a 100% downhill slope
Look at my other videos for more cures to headaches that won't go away.