Testing the shutter speeds on my (small) collection of shutters, I find the speeds faster than 1/100 sec are way out. For example, Copal:

1/125 measured at 1/83
1/250 measured at 1/166
1/400 measured at 1/166

Syncro-Compur

1/100 measured at 1/86
1/250 measured at 1/123
1/500 measured at 1/117

Compur-Rapid

1/10 measured at 1/15
....
1/100 measured at 1/80
1/200 measured at 1/107
1/400 measured at 114

Most of the other speeds were within 10%, and a few, spot on. Apart from the fastest speed on each shutter, I'd kinda hoped for reasonably accurate timings - Not wanting to send the mechanisms away for a CLA, is there anything that I could do to improve the speeds ?