Rage, the 350 has a liner on the non lock sides, but it appears to be only half the width of the handle, seated away from the opening.
I have recently re-evaluated this knife. I was not impressed by it at first, it has a very thin blade, the false edge making it even thinner. The liner also seemed thin, and the Zytel did not have a very good feel. It has a distinct false click when the tang slips off the ball detent, in the almost open position, very tricky and decieving. I had been using it as a letter opener.
I read a thread describing a custom knife maker who made gentlemans folders with an extreamly strong liner lock. One of the features noted were the oversized copper wahers that held the pivot area together and kept the blade from twisting loose, disengaging the lock. This brought the BM350 to mind, as it has similar washers.
Long story shortened, I gave the little sucker a test, and was not able to get the liner lock to budge. I put as much pressure as I dare, for fear of snapping the blade, but that thin little liner would not move.
I was impressed, but still am not crazy about the knife, for the other reasons listed above. Also, see the thread titled "interesting liner lock failure" as it seeems they might have problems with dirt and lint as well.