VK-31 or other BAT preamp upgrade


Has anyone tried upgrading the stock VK-31 with either Super-Pak or Six-Pak? If not the VK-31, then any other BAT preamp that uses 6922s? I'm considering these upgrades. Thanks.
mark
You might want to read my review of the 31SE for one perspective.

http://forum.audiogon.com/cgi-bin/fr.pl?rprea&1048831707&openusid&zzKipdent&4&5#Kipdent

I also reviewed the BAT VK-P10SE with SuperPak.

http://forum.audiogon.com/cgi-bin/fr.pl?rprea&1130915875&openusid&zzKipdent&4&5#Kipdent

Kip
Kip, the 31SE does not use 6922's, it uses 6H30 tubes. Therefore it is not really relevant to this specific question.

John
I think it is cheaper to sell the VK-31, then buy an used VK-31SE. The cost of the upgrade is just too much.

By the way, I may sell my VK-31SE soon, any one interested?