The thumb notch design is rather different from the one on the MK31. If you expect it to be the same tight fit you'll be disappointed initially, but as soon as you get used to it it'll work like a charm. I like my TI thumb notch razors I just wish the pricetag could be a smaller.That's a heck of a good looking razor Arne...love the spine work and scales! Is the thumb notch as comfortable as with the Mk 31's?