So I've pretty much narrowed it down to two knives, but thought I'd give some thoughts on the other knives (and there've been several) that I handled over the last week or so. Remember, I have size Large hands, so it's very YMMV, IMO kind of thing:
ZT0450 - Fantastic little knife, smooth action, disappeared into the pocket. ...but little. Oh,
so little. Just didn't fit my hand, I fumbled with it a few times over the three days I carried it and just...couldn't. Really disappointed by that because the action was amazing.
ZT0801 - Beefy. It had a decent action, not as good as the 0450 but more than adequate but in the hand it felt
thick. The dimensions were almost perfect, but it didn't feel right in my hand - the ergos just weren't there. It's one I desperately wanted to like but...

Back it went.
ZT0452 - So close to perfect!! Action was great, felt nice in the hand, but that 4" blade was just too much. It felt like I was flipping out a sword every time I pressed the tab. This one however is staying because my husband fell in love with it (same size hand as mine but with thicker palms, I have longer fingers) and won't let it go.
ZT0456 - Seeing a trend here with Zero Tolerance?

I was initially turned off by the Nick Shabazz review where he said that it was too thick for an EDC, but at the last minute decided to go for it. So glad I did too - the action is amazeballs, the looks are stellar, and it just FITS my hand.
ZT0220 - This one looked really good online but was pretty beefy when I got it in hand. It was balanced well enough though so I didn't mind the weight, but...ugh, that detent. I'd heard folks mention stiff detents on some ZT knives and this was my first real experience of that. The ergos were good but there was no way to get around how stiff that detent was out the box. By then I'd handled quite a few knives that were easier, so was immediately turned off by this one. It'll be going back this week.
Hinderer XM-18 3.5" Skinner - This was actually the first one I picked up after reading all the glowing reviews online, but the moment I got it in my hand... Not throwing shade on what I'm sure is a well-built knife, but it had way too many edges and hot spots on that handle for me to, well, handle. Extremely disappointed by this one but may be willing to give a used 3" a try later on, I just didn't want to smoothe down the corners of the handle of a $425 knife.
Olamic Wayfarer 247 - On the suggestion of forum members, I went for an Olamic 247 and, gotta say, I'm impressed. It comes with a ceramic detent ball (I think the bearings are metal though?) and holy crap is that smooth. The blade is not quite as free-moving across the pivot as the 0456 (that one likes to fall closed like a Grimsmo blade) but, wow, it glides across that ceramic detent. Beautiful knife too, excellent craftsmanship in every aspect.
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As for which ones are the keepers? Well I won't leave you in suspense: it's the ZT0456 and the Olamic 247. Initially I'd planned on only getting one knife for EDC and was having a hell of a time choosing between these. The ZT was just such an incredible flipper; I could play with that one all day and never hurt my fingers, whereas the lockbar on the Olamic is pretty stiff with a strong detent. But the Olamic had it all where it counted: smooth-smooth action, absolutely stunning looks, and it felt like a part of your hand when gripped.
How was a girl to choose?!
Well, lol, turns out I didn't have to since my husband this week decided to get ANOTHER expensive tool (costing way more than both these knives collectively), and reciprocity meant I had a larger budget to work with. But I think I've decided on my (for now just two, lol that could change) daily EDC's:
Pretty happy with my choices but, Lord, there's so much more that I'm now drooling over. Lol this could turn into a VERY expensive hobby if I'm not careful!!!
And quick note: I realize most of these (with the exception of Olamic) aren't really midtech knives but higher end production ones. I felt that, given the fact I hadn't handled enough knives to know what I wanted, I should give some attention to production models and I'm glad I did. There's some good stuff there, but you definitely get some better perks in terms of fit and finish when you go up a couple hundred bucks. :thumbup: