My new CSP2+ finally arrived, after waiting for nearly 2 months. I chose some modification options on it, stepped attenuator and Jupiter cap mod. The tubes come with it are not as good as your guys. The rectification tube is a no-brand Chinese made 5U4G, and three others are 6N1P-EV but from different sources by each other but all from Russia. I can read that one of them are produced in '72. However, it sounds impressive initially and without any tube rolling, I can see how big its potential for sound improvement.