It's a little late now, but the next time you need to free up a stuck bleeder screw, here's a procedure that works:
Remove the wheel cylinder and remove all the rubber parts, pistons, springs, etc. It needs to be a bare casting with nothing but the cast iron cylinder and the bleeder screw. Clamp the cylinder in a vise, and heat the bleeder screw with a torch until it's red hot. GENTLY move the bleeder back and forth with a 6-point box end wrench or a socket. If it gets hard to move, stop, and heat again. It might be necessary to let the casting cool down, apply some penetrating oil like KROIL or PB Blaster, and heat again. I've salvaged lots of brake cylinders that way.
Jerry
