74HC04 is out. Much thanks to Rhodes (again!) for this mod. The instructions are pretty clear on how to do it. Of course, it is still surgery on a chipset which always makes me a little nervous. The great thing about this mod besides the sound performance is that it is nearly free. I used 68 ohm resistors because that is what I had around. The resistors are just commercial grade stuff, certainly nothing special. I may switch to some high quality resistors in the future as per Pat's experience replacing the 100 ohm units in a similar function.
In any event, a pretty quick mod with IMO substantial sound improvements. Rhodes has described them pretty well in his original post regarding the mod. Typical jitter reduction stuff which I think most are able to discern by now. It is more open, airy, detailed (without etch), has better bass and bass definition, less grain in the treble and an overall more natural feel to the sound. Very worthwhile mod especially considering cost. One last positive note; NO long break in!!!
Thanks again Rhodes for all the work you put in on the forum. The availability of the O'scope and the posted pictures sure do help even for experienced modders.