Start the 4/1 (or whatever makes sense - you don't have to cargo cult it) vesting schedule for each founder on the date they started working on it (credit for t

Start the 4/1 (or whatever makes sense - you don't have to cargo cult it) vesting schedule for each founder on the date they started working on it (credit for time served). You'll likely have to revisit this later when you involve investors anyway. Just be sure not to give anyone a lot of stock just to watch them walk away after a few months.