I bought a Barber Silver LTD a couple of weeks ago to run with my Fender amps. While it does a fantastic job of producing some very nice light/medium tube-like overdrive, I've found that it thickens up my tone a bit, even when the LTD is off. It doesn't change the character of the original tone, but it's just something I noticed. There are two trim pots on the inside to adjust the prescence and bass. How effective is it to adjust these pots to get back to the original tone, as if I were basically plugging straight into the amp?