The WE can do up to 17″ blades, so you’re safe on the Bowie and the others, the real trick is getting the blade set right, but you know this.
The machete…I could write a novel about my experiences with mine.
IMO, don’t do it. Use a belt sander. Mine I did in 3 stages and blended the edges to make them all even. It took me WEEKS. Never again…
So I spent 4.00 and got a nice new polishing belt for my belt sander and to the eye…its the same edge.
Oh…and that big nick? he does know to remove that the blade will be a completely different shape right? Jeeze, it looks like my Mom used it…(she chopped a ham bone and famously broke a knife one year…)