Long story short... how does one regulate the timing between the B key and the Bb thumb lever so they close simultaneously? At the moment the thumb lever is about 1.5-2mm away from the close. This is a F100ASII Yamaha. I'm not aware of any adjustment screw for this. Is there one hidden somewhere? Thank you.
Ignore earlier below
How does one rectify a Bb thumb key that does not close fully.
As one slides the thumb from the B thumb key spatula to the Bb (eg as in at the end of the first phrase in Syrinx)
Every note works until I slide the thumb across to Bb.
It appears (perhaps) that some key arms are hitting the post rods (they are straight). Is there an invisible cork that has worn off somewhere that needs some height restored so that the same travel would propel the key to close seamlessly? That doesn't make sense either because that would mean if would hit the rod anyway. hm refelting between the spatulas shouldn't work either because the Bb spatula's travel freezes short of propelling the B spatula to close.
Preciate some of your wisdom here.