It is made more difficult as the head has new valve seats which means there is no data for shim thickness.
How this is done is to make a guess at required shim size, install the cams, torque the head and join the cam chain before measuring clearances. Then it will 99 times out of 100 be wrong so the chain has to be opened, the cams and buckets removed in order to remove the wrong shims.
Then it is simply a case of calculating the required shim thickness now that you know the original shim size AND the resultant clearance between cam lobe and bucket.
So, basically with new valve seats it is a job that has to be done twice unless you are very lucky.
The initial estimate for shim thickness was close, but not close enough, and all 6 shims had to be replaced.
Now the gaps are as they should be, 0.25mm exhaust and 0.20mm inlet.