I have been using both my S.E.X. and Crack for several years now. Enjoying both enormously. The S.E.X. is my favorite general purpose headphone amplifier (I only use it for headphone duty). And I have a lot of headphone amplifiers. One of the convenient things about headphone gear is that much of it isn't terribly large, heavy, nor especially expensive, so it can be easy to end up with a fair amount of it.
Both S.E.X. and Cracky are stock + C4S equipped. I bought two additional kits to build to experiment with, while leaving the current two stock. I have a pretty good map of where I want to go with both of the new builds. A couple of things to finalize. One of them is tube sockets.
Is there any reason to change the tube sockets (greater reliability, durability, electrical connectivity/integrity)? To something more exotic'ish, like PTFE machined pin sockets, Belton sockets, some vintage Cinch or Amphenol? Those're all kinda nifty, but the stock ceramic tin plated pin sockets seem to more than adequate for the job.
Thanks.