The age old Kodak marketing slogan in mind...
Credit for those pics for the original posters, I just found them on the 'net when I first replied to this kind of a thread.
Keep in mind that the pin has to be nick-free and the supporting plate in good condition, otherwise You're in for a grief.
Bass pins are much easier to obtain nowadays, so when the pin starts to show wear, replace it.
If You don't, the ball can dent/chip the supporting plate, and a far more costly repair is the only option.
My preferred method of inserting flat-top acoustic strings is to drive the ball-end into the hole with the pin, and to pull the string upwards when the ball slips forward.