Nice! And great that you added the gain information. As
@sam6550a pointed out recently, just 'cause an alternate tube will fit in the socket and has heater current requirements that fall within the max allowed doesn't mean it is going to work well in a specific component, and the gain is an important part of that equation. From my own experience, Vali 2 (OG) came stock with a 6BZ7 (gain of ~35). It plays nicely with a 6SN7 (gain of 20), and also plays nicely with a 12AT7 (gain of 60). Folkvangr plays nicely with both of those into high-impedance 'phones in low gain with the impedance multiplier disengaged, but
doesn't play nicely with
either of those into low impedance 'phones in high gain with the impedance multiplier engaged. Incubus sounds amazing with the 6SN7-gain it was designed for, but doesn't play nicely with a 3x gain 12AT7. The TL;DR point? Components are designed with tubes of specific gain. Substituting a tube with different gain may work, and it may not. And if it doesn't, it's not a failing of the component or design, it's only that that component sounds best keeping the designed gain structure intact. My advice for anyone just starting with tube rolling is to stick with tubes that have the same gain (or close) as the stock tubes, and having this information included in the spreadsheet is great. Once you have entered the depths of the rabbit hole where even light can no longer escape, only then start playing with tubes of differing gain.