Charles Hildebrant wrote:
> Dear MMD's: I am rebuilding the pump in a band organ. The original
> had thick cardboard reinforcing glued to the inside of the leather.
> I am faced with two questions: I am going to use heavy grade picture
> matting as my source of the heavy cardboard. Does anyone have negative
> thoughts on doing this, and/or a suggestion of an alternative and
> better material? I chose this as I can get it in the correct
> thicknesses, and with very low acid content.
I use modellers ply, 1/16" thick. It is three-ply, so is more flexible
in one direction than the other. By cutting it so it's more flexible
lengthwise, it will be very strong in the direction you need it. Also,
I never allow the ply ribbing to fold across each other in the corners.
This creates weak points where continual folding flat of the feeders
compresses the leather.
John Page, UK