Don't have a Warhawk but I have an older F3 and it's one of my all time favorites. Incredible flipper, great ergos, somewhere between xm-18 3 and 3.5". I can't say whether this is still possible, but I actually had a couple little customizations I had in mind and I contacted David about it, he had me send it in and did the little bit of extra work to get it to my specs, no questions asked, amazing customer service. This knife will never leave my collection.