I use my iDSD Pro with a iCAN Pro and the tube subject is very interessting to me. I find the iCAN is much more detailed without the tube mode. So i am very interessted in changing tubes for better tube sound with my iDSD/iCAN. I briefly looked for the tubes mentioned. 2C51 JW etc., but it seems very hard to find a matched pair for me to order. Can someone provide a link for me, where i can order a tube upgrade for my iCAN? (May be i will order 2 sets and upgrade the iDSD aswell). Is there a shop anywhere in the world that got a matched pair of WE 396A Military in stock? Maybe i take a look for the iCAN thread (if there is any on head-fi) and also ask for a tube upgrade there?