Off topic, but working in a chemical factory, I can tell you level 3 are indeed quite nasty and take precautions. Danger comes from long term use as well.
I received some thin pros that the backing looked like yours. Have not used yet, but I just assumed the backing was supposed to be cut better but they made it out of the factory that way.
I do not see why the wax would not have a refill, it does not say anywhere that it doesn't. The time that I've seen it did not was when it was much cheaper and did not come with the box. Anyway I'm interested in this but don't really need it, ugh... Is it worth the upgrade over P21S? Thanks!
Nice Harbor Freight tool cart! I almost pulled the trigger on one this morning for tool purposes... cheap cheap.. gives me an idea. Now it will be for both.