people, unless you’re cutting angles across tubing - the easiest way
is a $1.99 plumbing tube/pipe cutter from the hardware store. they
come in sizes that can be tightened to fit either small tubes or
large. if there’s a little compression at the end use a center punch
to gently ream it back into the right diameter. you will not get a
cleaner cut with less effort by any other means.
listen more now, don’t look dumb later.