Hi, after replacing my brake master cylinder and most of my brake lines I have had a hell of a time bleeding the front wheels. I bought a Gunson bleed kit while in the UK in March which helped but I still had air in the front lower cylinders. I had already drilled and tapped bleed screws into the top front cylinders which helped.
I ended up removing the lower cylinder dust covers, then after pressurising the system I pried the brake shoe away from the cylinder slowly allowing the slave piston to push out. Just as the seal was getting to the end of the bore I tipped the front of the piston down allowing the trapped air out of the upper part of the cylinder bore, I then allowed the shoe to start pushing the piston back then released the pressure off the system. I repeated this for the other side and now have brakes again
I am now able to take the Landy to the British car show in Fort Erie, Ontario for the Canada Day weekend. Hope this helps out folks with Series brake issues.

You should always compress pistons then bleed to reduce chance of trapping air or just use compressed air bleeder.