Re: 30% chance of failure?(@AC)
You didn't know how to copy tape cassettes. It was an art form back in the day using some cruddy Hi-Fi equalizer...
I did that with my ghetto-blaster, wich sported a double tape deck and a graphic equaliser. This simple setup allowed me to pirate copy dozens of games without an issue*.
An exception was a game called 'Star Paws', which I finally deduced was using the length of unused tape at the end and the beginning of the tape as a proof of being an original. I wasted many hours of my life cracking that nut, and enjoyed every minute! :-)
My iron was a C128, but I copied for friends program tapes from most major systems.
