I'll be honest with you and no offense to you by what I'm about to say , just take it for what it is but Emersons, production or custom may not be for you .
These knives are made a little different from flippers or other knives , I'd even say they are meant for the folks that open a knife and use it few times a day or once a day, but not folks that constantly play with knives that's where your lock issues come from . Emerson wear but the stick is a good thing , no stick means no friction and that liner can come right off .
If productions don't do it for you I doubt customs will either to be honest. Sure they have a thicker lock better f&f but they still aren't perfect and knives can be had a lot cheaper and may be more what your looking for . Basically Emerson is love it or hate it if you like the productions you'll like the customs .
A few drawbacks on owning a custom is if something does go wrong you may wait a while to get it back . Only Erie works on them and it takes time . It's common for a custom to be gone 6 months well maybe not common but I know of 3 knives sent back to eki for spa treatments and they took between 4-6 months to get back.
Don't get me wrong I love Emersons . I have a lot have owned a lot more and I'll buy more in the future. However and I'm just being honest here if I have 1k-1200 to spend on one knife it wouldnt be on a custom emerson. Too many other options with better materials that fit my needs better. Not a knock on emersons again .They have their place in my rotation . Best overall knife , not exactly . A no bells or whistles tool in don't mind getting dirty absolutely.
Honestly I think a lot of owning the customs is more of the cool factor associated with Mr. Emerson reputation and just knowing he made that knife you know . If it didn't have the history of EKI and Mr. Emerson behind it for example a new maker comes out with say any emerson custom knife , same materials same craftsman ship he'd probably get laughed off the block. Thing is Mr. E earned his stripea and has that reputation so he can pull it off. Now his knives at table price are a deal IMHO . Secondary market though I'd look elsewhere just my opinion you may be dissatisfied with it .