I have both and the shafts aren’t the same. Here is a picture for you.
Unfortunately, as you can see, there would be no way to fit the actuator and spring washer onto the JLF shaft, and the JLF shaft wouldn’t be able to fit into the pivot
I’m not currently using my LS-58 because the case I want to put it in isn’t done yet, I could send you the shaft if that would help you get one and get us some Dragon Shafts fit for the LS-58. The good news is, the shaft would also fit the LS-56 which is another popular stick, and POSSIBLY the LS-33 though I do not have one or a way to test though the shaft’s look similar enough.
If I sent you my shaft, what kind of turn around would we be looking at?
P.S. How come the Sanwa versions don’t have shiny shafts? Is it possible to have it anodized down to the pivot as well?
P.P.S.S. (or whatever) You know, these would look really, really bad ass in a black nickel color. Check it! If you had a black nickel LS-56 stick, I’d buy it in a heart beat.