I haven't had much experience handling blades with thumb holes. I have a Spyderco Mannix, but have yet put it into my rotation. I usually carry a Bob Dozier Folding Hunter, Large Sebenza with Flat Grind Blade or a small Mayonaized Sebenza. All of these have thumb studs and work fine for me.
However, since we are on the subject of Tom Mayo, could anyone share some information on the type of locking system Tom uses for his folders, such as the TnT and also share your thoughts of the quality of this locking system in actual use? How secure is the locking system as compared to other knife makers?
Thanks,
David