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Hey Nightjar, and any one else. What sort of mesh or cloth is on the green plywood board you have under your riffle tray and is this to catch the fine dirt dropping down through the riffle tray into the bellows? On my riffle tray I am using 100 micron stainless steel mesh. Should I expect dirt...

Hey everybody, but especially Dave and Nightjar, I am building a wooden bellows type dry blower, and I am hoping to have it finished shortly so I can take it to WA when the borders eventually reopen. My riffle tray is 830 x 300 and the bellows is the same size. What stroke should I aim for on...

Fascinating. Very helpful.