So I tried taking a zdp 189 blade and putting it into a g10 dragonfly handle. Tried at first to put the lock bar that matched with the zdp into the g10 handles. That caused the lock bar to stick out over liner in the handle. Next i tried using the lock bar from the g10 with the zdp and That caused the blade to stick out over handles when closed. So I could hit the tip of the blade when it was closed. I was really hoping it would work out so that I could get some custom scales made but I guess not.