Flexaret Va shutter speeds

Hello guys!
Now that Shutter-Speed app is out for Android, I bought the plug!
And went on happily testing my cameras!
For the Adox 63 Mark IV, Prontor S shutter all the speeds are ok, but:
1 sec. overexposes 1/3 stop
1/50 underexposes 1/3 stop
1/100 underexposes 1/3 stop
1/300 is actually 1/250 spot on!
The Flexaret Va is a problem, though... Metax shutter... Self made CLA!
All speeds spot on, but for the 1/200 and 1/400 being 1/140 and 1/178 respectively...

Does any of you can confirm if this is normal or if I did messed up in the CLA?

Leaf shutter speed can and do normally vary from the nominal.

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