Did you run some under center too?
Yep we ran both Undercenter and from the pistol. Often with reads on defensive alignment to shift on a call. (we would shift to undercenter but the play call would remain the same) This was done if the QB recognized a stunt or something from gun that would increase success by shifting to under center or vice versa. Each play had a pass check off of it as well as pre snap hot call (usually it was a slant right where a backer was blitzing from).
All in all we had 8 series of plays each series could be ran from the gun or from under center. Gun being a pistol formation.
10 series - Midline, QB sweeps and QB traps 10 and 11 were midline left or right, 12/13 was QB off guard dive, 14/15 was trap to on the end from the backside guard (typically this was ran from gun) 16/17 was influence trapping the end (would also be from the gun) 18/19 was a sweep. Backfield action on 14/15 was counter.
2 series was all triples. of varying styles.
3 series was all BB runs of basically the same variety as 10s
4 Series was A back action ISO sweeps, counters, traps all form the I motion (motioning to I then to the trail A back.
5 Series was all the wing A back or the one not in twirl doign similiar things.
6 Series was screen passes/play action.
7 Mid range passes
8 Long range passes
Reciever route combos were tied to the second number in passing series. Or explicitly stated like Trips Right 75 F Hole (this was a curl flat combo with a deep corner on the play side. Curl on the backside and F would sneak through the line after a play action and run straight up the field. We scored many a TD off this as the B back woudl be completely un covered against a single high. And stuff like that.
Formation wise we lived in standard Flex 50 percent of the time, trips or twins alot of the time. and alternating gun and under center based on defensively alignment or situation. Plays were all relayed on A-back and WR rotation. But we had a limited playbook for HUNH that was simply called by the QB using a live /dead audible system. (First and third were one color, second was another. live color would be said in the huddle or on sideline when we used it.