Hey Matt
I ask because I was having problems at first with not being able to react to counter cuts when I "over extended" my cut
I don't think i have seen you "over extend" a cut, I think what you do is cut and stop moving and try to take up a proper gaurd quickly, this is allowing them to attack in the nach, here is were the weakness of the middle gaurd/pflug is exposed you have to do two thing's in order to cut from it 1) raise it above your head(vom tag) 2)then you cut (pflug/middle gaurd is a great defensive position the only quick thing you can do is thrust), which allow's your opponent time to prepare to defend and then attack so essentialy you never had the initiative you only thought you did so your cut will not be fast enough to keep him from attacking after, when you do the vorschlag and nachschlag, the second attack has to be quick enough that he will have to defend it, Doebringer talk's about the vorschlag and nachslag, there can be no hesitation between the first strike and second strike, if there is hesitation he now has time to do his own vorschlag there by denying you your nachschlag, this is the nachriesen, moving offline when you attack is also very important, remeber we are not doing Kendo we use angle's of attack not just speed, because it force's your opponent to adjust, also remember our discussion of controling the tempo/rythm of battle, that is why when he attack's you while you are still attacking him instead of defending himself it will be a double kill because you are alway's moving and changing the tempo, Doebringer talk's about the double kill.
The only way to avoid the double kill is to use one of the five strike's in the proper, range, with the proper timing, and when you flow through one cut to another and change the tempo it will be less likely he can effectively determine what gaurd you will go to or through and it will be more difficult for him to set up his "Meisterhau", because you just keep moving from one thing to the next, fast then faster, like was stated earlier Doebringer talk's about constant motion, and Lichtenauer say's something about if you are moving your alive, only the dead stop moving.
there are a million and one thing's to think about in this "Art" and I think it will be the "one" that spell's victory the other million are very important, It is the One you forget that will be what bite's you in the butt, or get's your skull cleved.
Jeff
Disclaimer:
Doebringer has been parphrased, he does not state the exact same as what i have written it is along the line I stated above.