I feel if you are having problems with a standard jewelry saw then you should probably study your technique in sawing. I hear as many people complain about the Knew Concept saw as those who like them in the Jewelry making community. As my favorite mentor said " The Knew Concept saw is a over complicated solution to a problem that doesn't exist " . But to each their own.
Hmmm...I don't think I said that I had a "problem" with my cheap-a$$ X-Acto "jewelers" saws, other than they're toy-like in their build quality. The lever-action blade tightening on the Knew Concepts saws is a convenience, not a necessity.
I bought mine because I wanted it, not because I needed it. Their aluminum frames and precision features are awe-inspiring, as opposed to bent, zinc plated steel bar and wing-nuts on the cheaper saws.
I am pretty sure my sawing technique is on a pretty professional level for a model maker, since I've been a Senior Industrial Model Maker for myself, for Battelle Laboratories and Morton-Thiokol (manufacturer of the Space Shuttle SRB's and Mercedes air-bag technology) since I got out of the USN back in 1975. As for jewelry?...I don't give a rat's weenie about jewelry, so if the saws are difficult for some jewelers to work with because they're too "complicated", that's their problem, not the saw's.
I'm sorry...really...but I find the whole concept that the Knew Concept saws are "overly complicated" to be...
In fact, the lever-action blade tightening feature, makes attaching a new blade significantly more simple than the contortions needed to attach and tighten the blade on my old X-Acto saw...and forget about blade tightness consistency!
Yup...to each their own for sure....and I admit I really like fine tools such as the Knew Concepts Jeweler's Saw at my model railroad workbench.
Just sayin'...
Bob Gilmore