I have begun to come to the conclusion that the question of which lock is best is rather like which Scotch Whisky is best or whether a Mercedes-Benz is better than a BMW. If they are well-made, I suspect that they are all strong beyond the average user's abilities and that the differences are somewhere up where only the very most demanding will ever test them. I have lockbacks, linerlocks, a compression lock, two rolling locks, and three Axis locks, all by quality makers and I can honestly say that, for my uses, there is hardly any difference among them in durability. There are, of course, differences in ease of use. For that, I would rate them as follows: Rolling Lock, Axis Lock, Linerlock/ Compression Lock, and Back Lock. I put the Rolling Lock ahead of the Axis lock only due to its larger controls being easier for my arthritic hands. I find the Compression Lock and the linerlock to be so similar in use as to have a negligible difference in convenience. All of my quality linerlocks are Spydies, but I have had a couple of bad linerlocks that weren't Spydies over the years. My God, but were they awful! I think that the linerlock is a bit like the little girl in the limerick:
There was a little girl,
Wo had a little curl,
Right down in the middle of her forehead.
And when she was good,
She was very, very good.
But when she was bad, she was horrid!
Linerlocks are very dependent upon proper fit and upon proper materials. If you don't have them, man, you have problems. I truly believe that Spydies have the best, what with their eccentric pivot and all.
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Walk in the Light,
Hugh Fuller