I bought mine from Krale as well. They list a 20-joule version, which I think converts to 16fpe. In reality, it seems to be less than that. When I shot mine over the chrony it was just under 12fpe, but it was a quick and shaky shot, so not high confidence.
Mine has been doing well with FTT 4.52, but I haven't experimented with a large variety of others.