Within league standards there is ample latitude for individual variation, many batters settling on their own bat profile, or one used by a successful batter. Formerly, bats were hand-turned from a template with precise calibration points; today they are machine-turned to a fixed metal template. Historically significant templates may be kept in a bat manufacturers' vault; for example, Babe Ruth's template, which became popular among major-league players, is R43 in the Louisville Slugger archives.
As I had previously mentioned, the amount of teaching points is limitless. The length of the game will really depend on how often you stop the action in order to discuss points related to base running, backing up throws, fielding techniques, and etc. If you have assistant coaches, have them distributed throughout the field in order to help with certain teaching points on the spot, thus eliminating full stoppages of the game. Now get out there and start putting the “FUN” back into fungo. I know that’s pretty corny, but I couldn’t help myself 🙂