Hi Ludwig,
I got almost the same results by measuring inductance using two methods,VNA and cheap LC meter. Yes, it looks like the tolerance is +20-25% for material #17 and +15-20% for material #6. After some thought, I decided to follow the manual. Soon I will receive a 1N4148 diode for modification and if I manage to solder this SMD microbe without problems, I will power on the transceiver and hope to see real scans of the filters.
I wish you successful completion of the build.
73
Igor, oh2jxa