For me, it's not a problem. But it could be a problem for you, particularly if you buy a knife without having it in hand first. Every knife has a slightly different lockup at the beginning. So maybe a Lightfoot liner lock shouldn't be your first choice.
My next suggestion would be an Elishewitz, but not a liner lock. He also makes excellent integral "frame" or "mono" locks that are better, imho, and don't have the same potential lockup problem. Anyway, they are easier to operate than a liner lock, especially the Crawford KFF that can take some practice.
So check out the Elishewitz integral locks. But get it directly from Allan or a first rate dealer like Les Robertson. Sometimes getting one from other lesser sources can be aggravating. Say no more...
Bud Weston also makes some really tough integral lock tacticals. He is a very accomodating guy who really can do a custom job for you, and Les is a good source for his work as well. I've been very happy with his stuff too, liners and integrals.
I didn't mean to discourage you from a Lightfoot. He really makes great knives, but you might be happier with something from Allan.
One last idea, and then I'll shut up.
There are some excellent knife shows coming up, like Toronto and New York. Shows are the best places to see a variety of knives, actually handle them [with the exhibitor's permission please!] and talk to the makers and dealers. It sounds like you are serious enough to go to one near you. Believe me - you'd have a blast! That's it for me. I'm shutting up
