From the moment light singles started shipping with no pneumatic (vacuum or pressure) instruments, it's been the dream of many an owner to yank out the maintenance-hungry vacuum pumps and replace the pneumatic instruments with electric ones. Doing away with pneumatics makes even more sense after a glass panel upgrade where the only item left is usually a vacuum-driven attitude indicator doing duty as a backup.
This is a companion discussion topic for the original entry at https://www.avweb.com/features_old/dumping-vacuum-for-electric