Could have sworn I had more 6" & 24" trigger clamps for stuff like this
A couple years ago I got a handful of F clamps for christmas.
My wife: “I thought you already have clamps”
Me: “Yes, I do. But not enough.”
Wife: “How many is enough?”
Me: “One more than I have.”
Also a little 18ga brad nailer makes those glueups way easier.
Not true for plywood in my experience. You will never get as tight of a glue up using only brads/pins as you would with clamps and a mechanical fastener. Screws yes but I don’t think brads have the holding power to prevent any gaps from forming during the glue up process.
how many thousands of boxes to break even?
When making non-standard size boxes it only takes one, because having it made custom is expensive as hell.
OR when you want better quality than the standard boxes you can buy anywhere. (ie boxes that last more than a month)