Very easy to trap air just forward of the MC—pull that rubber puck out and you’ll see two holes—clear them if dirty. Jiggle the lever and see if you can get the air to release—you’ll see bubbles.I’m assuming that’s the only way to truly tell if my bottom end is trashed is to pull it apart ? Also my front brakes and rear brakes are shot. I’ve changed the pads all around, new cables, new MC, bled them a million times correctly with a bungee on the lever while opening the bleeder. I adjusted the pistons in the front drum and got them to move with no pads excellently, but with pads just the slightest. Pistons are shot ?