Hi everyone. Last week I completely restored a Selmer Signet Soloist Basoon. Everything looks and sounds perfect but from low E to low A. Every time those notes are played with a bit more air, right away it "jumps" to the harmonic in the upper octave. If pinky F# key is squeezed with something, like a rubber band or a wood wedge, the bassoon plays correctly. The hole has been checked and refaced, the spring has been strengthened and I tried with both sheep skin and synthetic pads. Nothing seems to solve the problem. If a key were not sealing properly should not play well below low E (I think). Any one has an idea on what can be happening? I'm going crazy with it (a bit more)... Thank you and hope someone can help me.