Is there any place where I can see how much TME does a batch create?
If not, it would be nice if the wesite would whow it somewhere.
This has now been added:
Batch Size TrackerIt would be nicer if there were no scrollbars and the spinners were perfectly centered on the page and ever so slightly responsive. I've managed to get rid of the scrollbars and center the circles on my PC but that was after going through some pretty hacky and brittle HTML/CSS spaghetti underlying that page:

And why are you using Bootstrap (and loading apparently unused jQuery) for such a basic page? That seems pretty unnecessary.