Anyone use a tube DI (such as the Demeter, SVTDI, Juicebox, etc) to warm up their signal before going into a solid state head? I am using a Walter Woods or Epifani UL-502 (both solid state) and love them both. However, once in a while I need to have some tube grind when playing raunchy rock. I was thinking about using a tube DI or even a Sansamp Para Driver before the amp to do this. Any opinions / suggestions.