Here are a few suggestions prompted by Ray Finch's question about
playing reproducing rolls on an 88-note piano.  This also applies to
playing other-system rolls on 88-note and reproducing pianos.  And of
course concerns pianos which do not have a cut-off lever to accomplish
this, such as a Duo Art/88 Note switch.

As long as the number of holes-per inch, the width of the roll and
flange types are the same, it can be done.  If the flange systems are
different (!!?) you may have to re-spool the roll for your instrument.

Cover the proper number of holes at each end of the tracker bar with
tape.  I recommend Scotch Brand Magic Mending or "book tape" with
a tab folded over at the end to facilitate easy removal.  Good clear
shipping tape will work also.

If you don't cover the extra holes, you'll hear a lot of extraneous
bass bangs and treble plinks all the way through.

Do not use other gummy, sticky tapes which could leave a sticky
residue.  And be sure to remove the tapes at the end of your playing
session!  If you do get gunked up, do NOT use a knife or other metal
device to remove the tape.  Use something which will not scratch or
dent the tracker bar, and never use any kind of solvent!

This is akin to covering the erase-defeat hole on a video cassette
for re-taping.  For this I use the same system.

This brings up another point:  Very often, pre-recorded videos do
not have that little plastic tab broken out.  This can be disastrous.
I always check every new tape to make sure it's gone, to prevent
accidental erasing of each tape.  You don't want to lose all those
tapes of the grandchildren and your aunt's favorite cat!

Now go enjoy your "alien" rolls!

Lee Munsick
Appomattox County, Virginia USA