My main concern is I am acquiring a Leica with a leitz/braun flash. It isn't very old age wise, but probably hsnt been used in years. I don't want to just fry it right from the start so looking for more of a soft start routine just to play it safe.

I really have no intention of opening the flash to start off, I'm not comfortable enough with safe handling of caps, but just want to try the option of a safe start.

I appreciate the responses guys! I will try with an old but not dead set of cells to start and ramping up the time on the cap for a while.