Seems you were hacking yours differently to what I was doing. I acquired some army headed letter (UK), or rather 'stole'. With it I forged a letter with my MX-80 to trick a friend's parent to pop into the army recruitment centre.

This friend's parent had skived off National Service many aeons ago and I pranked him into going back to account for himself. The letter 'had to be legit' because it wasn't hand typed. So easily fooled. The things you do as a small child that you would never do as an adult.