I use a Harbor Freight hand held sheet metal punch, the better quality one that has a deeper throat. I set it in the vise and punch 5 at a time. I use 1 inch rounds but will be getting some sheets of ss screen in the future. If you punch 4 or 5 at a time, the punch will cut the screen clean. The vise is essential because you need to give it a fast snap for a clean cut. You can cut alot very quickly that way. I am not nearly as efficient as you are at getting the quantity of stem screens from a round. i tried the hand single punch with a homemade cutter. That did not last long at all.
Our screen replacement kit includes a bamboo poker for getting the old screen out, new screens and clips and a piece of 1/4" round steel rod with handle(reinforced fuel line tubing) for installing new screens from the outer end of the stem. The screens are the same size as before, 1/4 inch. What will be changing is the outer dimension of the stem tips. As you know Alan, SS tubing is sized differently than brass and other stuff. We will be using a 5/16 OD with a .020 wall thickness, putting the ID very very close to the traditional brass, slightly over .025 They will be pressed in the same as always, with an interference fit in the nylon tube and no glue of any kind. A 5/16" SS tube that will NOT give, pressed into a 5/16" hole in nylon that will give....just enough.
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A food dehydrator would be cool because of all the air movement within the box and out of the box, and the ability to dial down the temp for slow drying. Another new project here because we always can use blocks drier(Dry=stable wood) and we have a couple food dryers, one good sized.
There you go oozing ideas Alan, again. Simple ideas too.