Just did some work on my SDA-SRS's today, and the results were very impressive. Everything was better.
Solens, mills, RDO's, and AudioQuest wires.
I keep feeling like every time I do an upgrade that oh it can't get much better than this without spending a fortune. It just keeps getting better and better. I only did one side, and my friend and I both noticed a good difference in SQ between the two. I know the "blanket coming off" has been used a lot, but that is the best description. I am basically reiterating what many others have said about the mods. I just feel that these old beauties deserve to be treated well, and shown off:)