That is my SRM-007tII Spritzer modified. I have the SZ3s, which I actually like (perhaps my old man hearing), but they are good enough to say this about the mod. DO IT! Spritzer characterized the sound as a refined GES sound. I wouldn't know about that, but I can attest that the amp is really good now. It's fixed and it sounds great. The FR is excellent, detail is superb and it has MOAR BALLS in every way. It still reproduces subtleties non Stax listeners can only dream of, but now you can turn it up until your ears bleed and the sound is the same but louder. No audible distortion from the amp.
It's a win- win. Do it.