Good morning, Terry Again;
Since you asked here, I will answer here.
You can use any electronic strobe flash unit that has a "PC" connecting cable with your Minolta SR-T 100. You plug the "PC" cord into the "X Sync" socket on the SR-T 100 and set the shutter speed dial to the red 1/60th of a second setting. While not truly required with the electro-mechanical flash contacts of the SR-T 100, the Wien "SafeSync" will prolong the life of the contacts if the flash that you choose is one of the high voltage sync system types. As mentioned, the Wien "SafeSync" is not truly required in your case.
For selection of an electronic strobe flash unit, a nice convenience is one of the "automatic" models with "thyristor control." This electronic system built into the flash allows the flash itself to look at the subject being photographed and measure the light illuminating the subject. When it has determined that enough light for your film has been achieved, it shuts off the light circuit of the flash unit. Usually you will see a small round port on the front of the flash unit below the flash tube window. The light sensor will be inside that small round port and should be pointed at the subject. You do not need to use a Minolta flash unit. You can also use one by Vivitar, Sunpak, Braun, Metz, and many others; even Nikon and Canon.
If you choose a unit without automatic control, you will need to use the "Guide Number" and flash-to-subject distance to calculate what lens opening you should set on the lens for that subject distance.
A flash unit that has a head that tilts and swivels is really helpful with bouncing the light off a ceiling or wall.
Regarding "red eye," Wayne Naughton has written of the need to get the flash off the camera, usually with a flash bracket. Just a foot or so will be enough. Yes, it does make the package bigger and probably heavier. For my work, I like the Custom Brackets rotating flash brackets that allow me to change easily from "landscape" to "portrait" while keeping the flash above the lens at all times.
For further discussion of multiple flash setups and off-camera flash, perhaps those questions could go to the Lighting Forum.
Enjoy; Ralph Javins