Yeah, it's very sad that neo-SSPX don't make this information public so that the faithful have to dig around asking about it. It's done on purpose to basically force their position down everyone's throats. "We decided they're valid. You are not to question us. If we send you a priest, you are to presume validity." There's a huge amount of hubris there. Well, guess walk, guys, if it does turn out that these priests are not valid, you will be judged by God for all the Sacraments you've deprived the faithful of.