You might also want to consider Bob Backert at RHB Sound Desizn - he is unbelievably wonderful with anything that has tubes and has worked on, upgraded, and modified all of the Rogue products. You can get more info about him on his website at http://www.rhbsounddezign.com/
If you talk with Rogue they might be ok with sending you a schematic, I don't know their policy but it doesn't hurt to ask. This would give you the option of using a good local electronics shop. If you are interested in a little tinkering sometimes when you pop the cover the problem is obvious (e.g. overheated & blackened resistor).
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