hi Chris
yes to answer your question.
AA all the way,whether it be a pro sport or a TX, you will still probably have to polish the internals,and use a moly grease,as a de-grease & re-grease as they are mass manufactured.
to get inside them is pretty easy for a hands on mind? just check out YT
Tony Wall says the top end springers from AA ie: Pro sport & TX are as good as it gets,out of the box
then on the other hand,you have your HW springers,which also can be as above.but of recent times as reported on this forum & others,they feel HW has a QC problem,I have ex