I assume you're not using TTL metering? If you are, T-stops won't help you because the camera is not measuring what the aperture says it is - it's measuring the light that's being transmitted when stopped down to that aperture. An inaccurate shutter or sticky diaphragm can contribute to exposure errors of course (as can a miscalibrated mirror) but getting the camera and lens properly adjusted should eliminate the problem completely.

If you're using a handheld meter, I can see the benefit in T-stops but the light transmission of most lenses for 35mm photography is so good, it isn't likely to make a significant enough difference, even with chrome film. You'd need 15 or 18 elements, I'd think, before it started to make enough of a difference compared to using f/stops.