I wasn't able to find this in the user manual or anything, so maybe someone here would know what the tube layout is for the SVT2 Pro? ie V1 - input stage V2 - gain stage V3 - ? v4 - ? v5 - ? I'm trying to put together a retube kit and want to put a bit gainer tube in the gain stages, but not in the FX loop buffer, phase inverter. Cheers.