upright touchweight

[Jon Page]

If you want to increase DW, increase hammer return spring tension.
You an get a little more by increasing the jack spring tension as well.
You want low friction insure repetition in humid weather.

You'll need a tension gage to set the tension evenly.

Not something I would bother with unless the customer
was really displeased and begged me to do it.
-- 

Regards,

Jon Page