Just wanted to share some news.
I sold my 2nd 1626 amp (GXSE transformers and larger choke) today. The buyer took to his house to play on a pair of cornscala's I sold him earlier in the year and invited some friends. (A friend came to buy my DIYtube 300b (CXSE and 2 chokes) today as well. The long and short is they played the 1626 against the 300b and the Citation II and all agreed that the 1626 was victor... Less punchy than the 300b but greater seperation and detail. Now Im off to build to more 1626s :-).