Around ten years ago I posted on these forums extolling the virtues of vacuum leak tests. At that time only one manufacturer offered that feature (Hugyfot) and I attracted the ire of those who owned housings from different manufacturers, insisting their housings didn't leak so didn't need them.
It got nasty when I was accused of being in the pay of Hugyfot, or at least getting a housing for no charge. It even resulted with me sending copies of the invoice for my housing to an administrator here. Now, I'm not saying that no others have been sponsored with free housings from other manufacturers (selling them afterwards for a tidy profit) but now that vacuum leak tests have become appreciated and are installed on many different makes of housing so that they are almost commonplace, it would have been nice to have got an apology!