the gyraf ssl I built does not sound like the quad ssl Im am used to using, but it sounds great and am glad I took the time to build it. The gyraf 1176 specs a lundahl transformer, so I wouldnt expect it to sound the same as any 1176 ever made. Anytime you are dealing with a transformer balanced circuit, the transformers themselves are going to play a huge role in the sound that comes out of the box, so unless you match the transformers EXACTLY to the originals, your circuit clone is only going to get you so close. I wouldnt worry too much about what an original sounds like, I have a pile of vintage gear that all sounds different. I have a stack of 1272's that ALL sound different. Depending on how the stuff ages, etc, etc, etc, will really greatly impact the sound that comes out of the box. Dont worry about making it sound like the original, worry about making it sound good, which is a much better use of your time.
dave