Update: posted my Otter Mercator yesterday, today I got a Kwik Stud and modified it to work better for this slim knife. Here are some pics of the finished product, and explanation

USA Knifemaker Supply Kwik Thumb Stud Black Oxide

Otter - Messer Mercator Brass Large Carbon : Sports & Outdoors

OTTER-Messer from Urban Kit Supply

Kwik Thumb Stud - Brass : Tools & Home Improvement

OTTER-Messer Mercator Folding Knife 3.5 Carbon Steel Blade Stainless Handle

Messer Mercator Stainless OTT10826R_AB : Sports & Outdoors

OTTER-Messer Mercator Folding Knife 3.5 Carbon Steel Blade Stainless Handle

Otter Mercator Stainless folder view by www bushcraftcanada com

Brass Otter Mercators, locking and slipjoint knives

USA Knifemaker Supply Kwik Thumb Stud Black Oxide

A true masterpiece Amongst Cult Knives- Otter Mercator Black Cat

OTTER-Messer from Urban Kit Supply

USA Knifemaker Supply Kwik Thumb Stud Black Oxide

OTTER-Messer Mercator Folding Knife 3.5 Carbon Steel Blade Stainless Handle

German Mercator with polished handles and added pocket clip : r/knives