Variable size Canning Funnel

This Design
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There are literally dozens of designs for Mason Jar canning funnels. So what makes this one special?

* Most designs I've encountered are just a simple cone into a cylinder. I've built this with a nice radius in the throat. A nod to chickenchuck040 for the arc module (see attribution).

* Mason Jars and their lids are expensive where I live. So it's cheaper to collect commercial jars and purchase replacement lids. The sample STLs I've included are for the most c