set letoff to get acceptable aftertouch?

[Richard Brekne]

With respect.... I beg to differ. There are a host of causes for 
bobbling hammers and ruling out too little jack escapement is very 
quickly done on an upright. One other point here folks. We dont really 
have aftertouch in an upright.... not in the sense of the word we use in 
grands. For many years it was standard to simply not call that after 
escapement action in an upright <<aftertouch>> at all because it really 
isn't the same thing.  Tho to be sure sometimes the sensation can be 
made to feel a bit similiar.  Still... the key here (in the upright)  is 
jack escapement/clearance.

Cheers
RicB


    "Almost all "bobbling hammers" are the result of too little or no
    aftertouch due to settling of the keys at the balance rail."