Look on the F# bridge over the F and E feet. There should be some adjustment screws. Put a light into the horn if you can otherwise you just do the best you can. very slowly screw in the screw untill the F closes at the same time as the F#, then the E.
Go slow and open and close the F and E slowly and softly a few times to check. Idealy they should close at the same time but it would be better for the F# to close first, but only slightly.
Hope that helps
Go slow and open and close the F and E slowly and softly a few times to check. Idealy they should close at the same time but it would be better for the F# to close first, but only slightly.
Hope that helps