I made a measurement of the pump beam profile to make sure of the parameters without the last converging lens.
Result:
waist = 500um
waist position = -1m

the axis origin is the converging lens mount.

Then I updated the Jammt design using these parameters for the initial beam.
The current converging lens is f=150mm, so Jammt gives a resulting waist of 67um at 165mm from the lens. See figure. 

I also made a measurement and fit after putting back the lens. the fit gives a waist of 70um at 171mm. Quite comparable with the jammt result.

then I updated the configuration to have a pump size of 70 - 75um (diameter).
See the diagram.

I need a diverging lens f=-125mm and a converging lens f=100mm