I do want to apologize for dragging this thread on.

Here' s an image of some $10 flea market type butterfly knife I had in a box of junkers from my youth.

I have to squeeze the handles together, when it's OPEN, to engage the latch. The latch is then very tight and secure since there is plenty of tension against it:
Now, I'd expect a once $1,500 custom (marked down by the seller to $750, but not marked down by the maker, so the maker felt it was a $1,500 knife), to lock up BETTER than a $10 flea market POS. The knife in my picture was made in Korea. Obviously it was imported years ago before they banned imports on balisongs.
So when the customer calls to check on the lock and feels he was told it was fine and then gets it to find it's not, I think he's entitled to a full refund, no questions asked.
When dealing with a customer they may have 1 main issue, but spout out a bunch of non-sense about all kinds of things they were unhappy with. As a seller I'm looking at the main issue, not all the other petty crap. The main issue here is the customer felt he was told the latch worked and when he got it the latch did not work. The seller needs to focus on the main concern, the latch not working.
In this case the seller doesn't seem to care about the customer's concerns about the latch not working. The seller was basically saying he didn't see why the latch has to work in the open position. That's the seller's personal opinion, and his customer does not share his opinion. I would think most bali-song collectors and users would also not share the opinion of the seller that the latch doesn't need to function in the OPEN position.
So the seller needs to take his opinion and keep it to himself and try and RESPECT his customer's opinions, wants and needs.
I'd like to know, and maybe this was addressed, do other examples of this knife made by Brad have latches that work when the knives are open? If so, then this knife is certainly defective and Brad should fix it.