I like the circle cutter. Do not want to pay that much but when you look at what you get it is a deal. I watched the video, funny his battery died in the one demo. Flipping the 1/4" and magnet tab inside you can do smaller circle cuts. What do you think the smallest circle would be (with the S45), he has a WG60P torch, I like them but we do not sell them anymore. My A81 is a little larger than your S45.