Nice looking job. I love the breathing room in that chassis with a standard 18w - so easy to do a clean & tidy job. Even with V6 version there's plenty of room in there.
As for the CC's, I haven't noticed it's especially noisy. Gets a bit hissy with the boost engaged, but not TOO bad otherwise. Throwing a few metal films on the higher value resistors will make a difference I'm sure. As to the impact on tone, well, that's a discussion...
I haven't modded mine, other than to convert it to a V6. It gave me an excuse to re-do the lead dress, which I wanted to do anyway. It was my first build so there were a few things that needed tweaking in there.