I like this one the best. My suggestions would be to remove the hole and then move the slot down. I'd put it 2/3 up the step. I don't think the teeth need to be so aggressive but I also don't think it would really hurt. I would not go more than 1" wide on the step. You will really start to loose the packability of the steps. I would suggest for anyone who wants a wider step to take 2 and put them together to make a 2" step,
@huck72412 has done something like this with ameristeps before.
I would also stick with a 1" slot.
@Nutterbuster if you go to a larger slot that also means you have to go to a larger buckle. A 1" slot can work just fine.
Just for a little perspective on why I feel strongly about keeping the steps narrower (besides better packability). I learned to saddle hunting standing on screw in metal ameristeps. How thick are they? Maybe 3/8"? I also stand on the tree bolts all the time. So my needs in a strap on step aren't a wide step to stand on, they are a step that is easily packable for mobility but stable on the tree.