In my "not so humble opinion", that many issues is not a coincidence. It was a case of solve 1 problem, and find another....or 2.
As several people pointed out, the SSD guns were (pretty obviously) not meant for live fire of more than blanks for reinactors.
I'm not in the US and I'm sure our importers paid him, although they did mention the unavailability of repair parts for the guns which were returned to them...and the people who attempted to contact SSD themselves didn't have a lot of success either.