The only time (That I can remember) that I "didn't" request thumb notches was when I built one of my specials with a double hilt! The nice thing about my dealer special is that we are not limited to 5 options. In comparison (and compared to catalog options for the Model #3, which my original specials were priced by) here's the RKCC "Double-Duty" club knife. Can you figure out how many options?
Best, Capt. Chris