Well this could have gone into two categories, so forgive me if I am in the wrong one. I am new to TB but have been playing for 20+ years. I just started using a M900 DG head and love it, just wondering now if my B7K Ultra is redundant. .playing around with it. .. Support at DG says its not and can add to the tone, but honestly its very subtle as the m900 has a B3 built in.. I traded back in the VMT pedal (which I LOVED) as the m900 has that built in too. There does seem to be some eq shaping that is quite nice when using the B7K Ultra with the M900 but I am still pondering on if its more appropriate to sell it off.. I could use the money now !