But the question is were they returned or scrapped. And the answers in 18 and 19 say that they weren't returned to the USA. They might well have been scrapped or the orders cancelled. It's correct that even the mildest of dings around the edge will cause a jamb.
We had 2 at work that would jam-up at 15 and 8 rounds. Even after turning up an internal steel dolly to make the edges good, they didn't really improve much. (probably made worse by years of amateur repairs/fixes by assorted bubbas). A new-in-wrap gift solved the problem once and for all - which my son tested by giving the target the whole nine yards so to speak!