Up for sale is a nice Camlogix shutter tester that worked very well for me. I used it to test my LF lens shutters and allowed me to adjust my exposures accordingly. It would also tell me when my shutter needed a CLA. You can test your focal plane shutters and I actually used it to test my Leica M3.
One of these testers recently sold for $275 on the forum and I would like to get $225 plus shipping for mine.