I had alternator issues as well - driving at night (luckily in town) dashlights and headlights got dimmer then car wouldn't re-start - it had drained the battery. Auto electrician just shook his head when I asked if he could rebuild the original alternator. Replaced it with a new Bosch unit with inbuilt regulator and higher amps. Should be a lot easier for future repairs and more reliable than the external regulator which I took off and an auto elect I know just bypassed it. I let him join up the right 2 wires so I didn't st#ff something up.
With the radio settings problem, I have a kill switch that kills all power except the radio - just have a (fused) wire from the battery to power the stereo. Saves re-setting each time.
Cheers
Ken