RE: Worst tool ever...
I love my smart cut, does a far better job than I ever could. I'll be covering my latest over the next couple of weeks and it will see plenty of use. So don't understand what you guys are complaining about on that one.
As for worst tools, I have tried about half a dozen hinge slotting tools, and all were bad to worse. Best so far has to be the GP hinge slotting machine, that falls into the so so category. For the most part these days I try to hinge using the covering where possible, and avoid hinge slots altogether.