math for slug insert slit
the slugs work by snugly fitting in the existing tubes
in order to do this a slit is made inthe tube I just restimated and reestimated, and was surprised at how large a slit i needed to make in ordeer tio do this
thinking about another project, i realized that the math for slitting the insert slugs is
((tube wall thickness)*2)*pi [3.14]= (slit width)
.065" * 2 = .13" .13" * 3.14 = .41"
that is: two walls times pi gives the width if the slit
[ i think  does this seem right? i did wind up cutting about 1/2" slits
i wil try this soon...]
circles are amazing
