Dear Frank. Many many thanks for your kindest help. Maybe is my English not very good. ....I understand the vacuum settings for the shift and has been properly set. Every gear goes up or down correctly.
But when you say the modulator where could be set or adjusted? Today I tried tomfind any other screw to trim but nothing found excepting for the screw inside the vcv. Do you have any pictures where show hot to set the firmnes?

Really. Appreciated your help.

Daniele