Upright Hammer Weight/ Newton

[Joseph Garrett]

Newton,
A couple of things I think you are in error on: 1. The spring that effects
upright touch, more than any other is the Damper spring. But, even the lowly
jack spring can effect the touch. 2. The greater mass is NOT on the back of
the key, in uprights, unless it happens to be of European design. We front
weight our keys and the Europeans back weight their keys. I personally think
that back weighting makes more sense, in terms of touch.
Regards,
Joe Garrett, RPT, (Oregon)