yup that is the i was thinking it will have to go on a rail or the other way is to make a small slot in the side of the fuzz with a micr servo sat in the fuzz behined the cocpit with some sort of linkage conected to the canopy so it travels up and down the small slot and as to inflight to stop the canopy lifting with the air flow i thought about a thin magnet like the ones you put on your fridge
i have done a small sketch what you think