For xmas I received a matched set of 4 6L6GC tubes by Ruby tubes. I know they are re-stamped tubes, as that's how Ruby tubes rolls. On average, from 1-10, what's the quality I can expect? I'm modding a Carvin X100B to take 6L6GC tubes instead of EL34 tubes. (if you're not familiar with the amp, it has a switch that allows this, great feature!)
EDIT: It currently has Groove Tubes EL34's and 12AX7s, Im also switching to Tung Sol 12AX7s and recording my changes on youtube.
Out here you've gotta know where your towel is!