I spent two weekends figuring it out the first time.
You can bleed the brakes without disconnecting any lines. You have to remove the bolt that connects the master cylinder to the brake pedal at the bottom. Then you can rotate the master cylinder about 95 deg., that gets the lines such that you can pump fluid in from the bottom all the way to the reservoir without any place for bubbles to get trapped. It an easy one man job.
BTW, I use an elastic nut on the cylinder to pedal bolt that has to be removed. It's easy to see, you can check it as you strap in. I was worried my shoe would snag the specified cotter pin arrangement, I know of at least one ground loop caused by that happening.
RV-4 - flying (bought)
SNJ-5 - ground up restoration, almost done.