I have looking around for some replacement armatures. To get a deeper education I have read a ton of these post trying to find the answer to these questions.
What is a Vortex Armature.
What is a "B" Series Armature. Epic Motors? Binary Cans?
What is a "P" Series Armature.
What is a "K" Series Armature. Reedy Kryton Armature, Yokomo...?
It has been my experience when buying replacement armatures, just go to your local web-hobby shop. Type in "replacement armatures" and you get everything ID'd for you by manufaturer. Now you get these "series" armatures...
Got an idea, these "series" a code for information on the stacks, web, balance, comm size, etc?