You're good, no jerkiness taken.
The genuine Dahon Deltech (only OEM now, available as retrofit this summer they say), is set up just like the shrouds on a sailboat; Stainless steel cable with swaged end fittings with threads and nut to adjust.
The Dahon monotube frame with hinge, is "adequate" for the application. I have seen several express that "folding frames are not designed to last forever". Maybe, but I want at least a couple decades. The monobeam itself is plenty strong, but the hinge does not have a wide "spread" so is inherently weaker. Usually to get stronger, you can eliminate the hinge and have a swinging triangle like a Bike Friday, which also allows them to make the Diamond Llama instead of just a monobeam, super stout frame (the basis for their new All-Packa), but it's a messier fold IMO than the Dahon. The Deltech and my rigged improvised replacement, does the same thing, but does not impede folding. On a diamond frame, the lower downtube is loaded in tension and torsion. The cable doesn't improve torsion, but the big monobeam is plenty stiff. But the cable increases the "depth of section" in bending *enormously*, and further, places the hinge in compression and not bending, also a big plus. It may look like a kludge, but is entirely sound in theory. Having said that, the newish Dahon Launch uses what may be a better folding joint, once folded, there is no load on the hinge pin, that only exists to hold the two pieces together when folded. The hinge joint is interlocking teeth, looks good on paper, my only question is whether there will be tiny movement in said over time, resulting in unflat surfaces and non-tightness. We'll see. I think that design, if truly superior, should be implemented across the board. Look closely:
IIRC, Dahon is also claiming max load increase to 300 lbs with Deltech, up from 231 lbs. That's a big increase, which should also increase fatigue life of the frame greatly, at lower loads. Fatigue life is non-linear with respect to load and stress; IIRC, each 10% reduction in stress, doubles fatigue life (and that's a conservative estimate, often it's much more in high cycle fatigue).