If you'll search the history here at bladeforums, you'll find a thread from a few months ago asking "What is the Ultimate Lock?" The conclusion was that the balisong is the ultimate lock. Lock failure, which has been demonstrated on every other type of lock ever made including the Axis and other "rolling lock" designs, are unheard of short of the solid steel handles literally breaking.
So, what's so great about the BM45? Well, the quality is world-class on every one. The pins are joins are so wonderfully made that the knife moves like silk. The Weehawk blade profile is, IMHO, the best ballance for a balisong (though some argue for the Tanto in the BM44).
So, the BM45 is the best production example of the best knife design. That would make it the best production folding knife ever made, IMHO.
Now, if you'll search the history here you'll also find many threads about "what is the best knife?" The answer is that there is no answer. It's like asking "what's the best production car?" Twin Turbo 300ZX? Well, that's a great car, sure, very fast and great handling, but I've got a big pile of wood chips I need to move and that "trunk" looks pretty small. So, how about a big Dodge Ram with the big diesel with the extended bed and extended cab? Now there's a truck! But, while that extended cab is big, I've got a church youth group to pick up and they really can't ride in the bed. How about one of those new Ford Expeditions then? Yeah, it's huge, but for me to just commute around town in, it sure burns gas. So, how about a Chevy Sprint? Well, it certainly stretches the gas budget, but it can't get up hills very well. You see, there is no one perfect car for every task.
The Bali-Song is great folding knife design and they're fun to play with. The BM45 is a great knife no matter how you look at it. When awards are made for the best quality production knife, the BM45 has got to be a strong contender if not winner.
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Chuck
Balisongs -- because it don't mean a thing if it ain't got that swing!
http://www.4cs.net/~gollnick