Mailist to discuss all issues regarding the Digitech GSP-2101 Guitar FX Processor

Hello,

I currently own 3 2101's and I want to start to experiment with 
different tubes.  I understand which distortions V1 and V2 coordinate 
with but I would like to try some different value tubes.  But before I 
do I wanted to check with the memebers here.

Will the 2101 accept a 12AT7, 12AY7 or possibly a 6201 without damaging 
it?

With that said...  what is the current mindset with replacing the 
12AX7s with NOS 12AX7s?

Thank you.