Yo Mamma made me aware of the discussion here so I popped over for a T&E report on the one he motivated me to pick up.
emw479, impressive knife for the price, but look at your factory QC. Are they being manufactured in Yangjiang, Xinhui, Jieyang or Xinxing?
I sifted through a dozen of the tan folders in the store (thanks for packaging them in blister pacs with the blade open so you can see the lockup) before I found one that the liner lock was at the right place (between first and second third of the engagement slope). That the factory isn't getting the parts dimensions as you expected or they're not assembling to your standards for safety on the majority of the knives is unfortunate.
I noticed the knives themselves weren't marked with country of manufacture.
I tested the knife lock engagement with manual and soft and hard flip open and was satisfied that there was good engagement. The liner lock did move deeper than the 1/3 boundary, but no further than just into the middle third.
I used 6 spine whacks to test the lock and the lock on my test knife held without play or failure.
Vertical blade movement was nil to trivial on both manual and flip opening.
Side to side blade movement was a bit more than I like, but not excessive and I did not adjust the pivot screw (BTW, what are the washers? Nylon or Polyethylene ?)
As YoMamma points out the liner is too prominent for the safety you're looking for. Taking it down a bit would make it more difficult to unlock, but harder to unlock unintentionally.
I clamped the blade between 2 poly cutting boards and simulated slicing/prying and the prominent liner lock released allowing the blade to unlock. Again, reducing the prominence of the liner lock will make the lock less likely to do this.
I tested side to side and up and down engagement of the blade again and it was still solid. My compliments.
I stropped the edge to remove a slight burr and used the leaves of a cardboard USPS flat rate box for test cutting. I was able to make 15 cuts before the blade began to rip the cardboard. That's not much and not what a heat treated steel should provide, even an inexpensive one. I steeled the edge and stropped again and was able to make another 8 or 10 cuts before it began to tear the cardboard.
I tested the edge with a file and it bit deeply instead of skating. I tested my Sebenza and the file skated as expected. It behaved like it was around the mid 40s in hardness instead of the 52-56 it should be. I have to assume if the steel if 420J2 that the batch of blades was not properly heat treated.
It is remarkably impressive that you produced a folder with G10 sculpted scales and that it can be done with good lockup on a liner lock for this retail price! It appears from YoMama's "field test" that his blade is holding an edge much much better than the one I tested so I conclude the factory knows how to properly heat treat this steel, but they didn't perform the proper job on the lot of blades mine was selected from. Questionable QC. The other indication of questionable QC is that 9 out of 10 of the knives in the store had poor lock position (I admit I bought the best one I could find after a very brief search and didn't buy one of the others to test), but the fact that my test knife and YoMamma's both had good locks indicates it is possible for them to make a safe reliable lock in the facility. The knife is comfortable, carries well, deploys easily enough (a little more detent would make the flipper snappier), can be made to lock solidly, and reports are that the blade steel can be suitable for a properly heat treated 420J2 (in spite of mine being nearly unheat treated. Improvements in the 2 important areas of the lock prominence (influencing safety) and heat treat would make this knife unfathomably good for the price.