[Milu]

Flipping a knife open like that works (I do it too), if you know how to hold it you only need normal lubrication. It does however, put a lot of stress on the knife, much more for example than a switchblade opening. It is appaerently obvious to a manufacturer that ones done it and it voids the warranty.
Sharpening with an arkansas stone is hard to learn but worth it, I think it is practically a zen experience. Schrade are still excellent value, I have one I think is called a sharpfinger. BTW I also don't feel dressed without a knife after carrying one all my life and I avoid flying when possible