I've had some experience with Jelco arms and their derivatives over the years, but not on my Technics. I suspect that, while the stock Technics arm is good enough, even the entry-level Jelcos are probably superior. I've just been so satisfied with the performance of the stock arm and Denon DL-103 that I've been too lazy to do the surgery.
I hope JohnnyB can update us on the result of his SME swap.
I hope JohnnyB can update us on the result of his SME swap.