I find my ZDP/Ti Leek more practical than the Kwaiken. Slimmer, lighter, easier to deploy. I was excited to get the Kwaiken, to be sure it's a great looking knife, nicely made and finished. it never made it to my pocket tho.
Is your kwaiken pre-redesign or post? Mine is post, and I wonder if there may have been a change in the detent that holds the blade closed as part of the redesign? I've got #2131
Mine appears to be #1062, assuming that the number on the spine of the blade is what you mean. Also, my flipper is completely smooth, and I've heard newer ones have jimping.