Convergent Audio Preamps

Hi all. I ordered a new SL1 ultimate, MK II which I expect in the next 2-3 weeks. I'm very excited as I hear the CAT+ Berning is a wonderful match. Anyway, I have a tube question:

Regarding the linestage, I understand there are 3 6922's and 2 12AX7's. I happen to own a matched PAIR of the very ecellent 1960 vinatge (US-made) Amperex "Pinched Waist" PQ 6922's which I used to wonderful effect in my former First Sound preamp. Naturally, Im thinking they would also sound fab in the CAT, but the CAT used three of these. So in what positions does it make most sense to try the PW's in?

I dont know much about what these tubes do to the signal individually, but I would think that 1 or 2 of them might be more sensitive, hence, I would try them in those positions. I know I could call Ken, but I am sure he would poo poo the whole thing, as i recall he's not for rolling tubes in his gear, but i want to try. You dont need a degree in operations research to figure out that there would be 3 possible ways to insert 2 tubes into three slots, and I guess i could just do it and listen, but i figured I would tap the collective AG community.

Thanks - Art

Artg,
the input linestage tubes in position V6, V7 are more important than the V10 position of the 6922. So, try the pinched waist 6922 in those positions 1st.
FWIW.

thanks bombaywalla! That is exactly the info i was looking for. Just curious, ever roll the tubes in yours? Art

Artg,
i rolled the tubes in my SL1 Sig into NOS GE smooth plates and Russian rockets in the Phono stage. Hugh difference!! Waaaay more dynamic and much quieter with greater air and extension.
Having heard the Ultimate but not the Ultimate 2, I personally do not feel there is large difference now.