Hi there, I had Jens Kruse in CA, USA mod my Mesa Dual Rect. 3 channel. He did a great job. Communication and service was very professional. About 10 day turnaround. Best way to explain the results...sounds like a blanket was taken off the cab. Much more clarity. Slightly more gain in channels 2 & 3. Removed the classic bass flub in the amp. Much less fizz or harshness in the higher presence and treble settings. The clean channel sounds more "chimey" and the pushed setting has much more gain and can be very rock'n. You can hear in the sound clips the distinct difference. I wish I had recorded a different "clean" comparison, but it's the same DI reamp for all channels. ALL amp settings and recording set up was identical. Knobs at noon and gain at 1 o'clock. All reamped from 1 DI. No variations. These are not the "ideal" settings, but maintained the same for comparisons. There are sound clips for all 3 channels of the original and Modded Kruse version. https://soundcloud.com/user970410307 Let me know if you have any questions. I hope this helps anyone thinking of mods from Jens at Kruse Kontrol. I highly recommend.