I haven't received them yet. They are being shipped to me by the person I bought them from. To be perfectly honest that is what I am driving to ND to pick up. That and some home brew supplies I can't get shipped here (being in Canada makes it a ***** to get things from places like Northern Brewer and we don't have a decent shop anywhere near where I live.)
I had the seller measure and weigh the stir plates before he boxed them up. The quote I gave assumed his measurements and weights are accurate.
I also asked him about the top plates. Apparently the one in the picture is the worst of the bunch. He said that the top plate is thin aluminum and that it bends pretty easily.
My original plan (when I made my first post) was to bring the plates home, test them and try to fix a few of the top plates myself to make sure it's easily done. I didn't expect shipping from here to be so expensive though. Doing it this way will work but I'm not sure how I'm going to test the units (and I won't sell them unless I can test them first). If I was spending the night I'd just test them in the hotel.
Any ideas?