So, I took out the vernier caliper and measured the two tubes I have, they came in as .713 long range, and .736 medium range, which implies they have both been reamed to cylinder and Light Modified or Improved Cylinder. So scratch that OP, the one I seem to need is the long range one, or maybe just another set.
Regarding the plastic wad problem, I saw a guy on youtube who loves the old higginses and he just cleans out the plastic wadding once in a while from the brake, they create no other issues. So, I'll give it a try and see if I get the same result.
Thanks to all who replied by the way, lots of good information.