If I wanted to change from Bart preamp to an Aguilar OBP-3 in my Q5, and keep the Bart pickups, is that an easy swap out, and reversible? I'm no electrical genius but will try easy things. Thoughts? Also, I hear good things about the episode preamp - same question, easy swap? And thirdly, what other options are out there besides onboard preamp swaps between Bart, Aguilar, EMG - they seem to rule the market. ab