using the tray in an upright, the tray's channel is
placed under the back of the hammer with the tray under
the hammer shanks. The spacer should be used in the
channel if there is a gap under the hammer tail.
placement of the tray in a grand is with the channel
over the catchers, with the hammer tails resting in
front of the channel. The spacer is not used with the
tray in grands. The tray may also be used to install
upright hammers keeping the glue from running onto the
hammer felt rail.
spacer bar's lines are used to travel hammer shanks.
When the bar is raised free, the shanks move against
the etched lines on the bar. The shanks that need to
be traveled can then be identified. The bar can also
be used to travel grand damper levers.