yes i was thinking that leather (Canvas)go into chamber that is it like when i try with inner tube ithink that is perfect example
the inner tube go inside and make sutuff harder to work
why someone make bellows ribs but some folks make only 3 boards for bellows what is purpose of that 2 or more ribs.what will be without a that ribs i think i a bit know .WIll the cloth of bellows go into a chamber without a ribs