So I have been running the AT7 mod in V4 and thought about doing some tone searching using tips and tricks I have heard about. My favorite finding was awesome! I found that if you crank up the presence on the mark V and drop the 6k slider down a moderate amount the tone becomes extremely aggressive and vintage in the mark IV and IIC+ mode. I felt a small bit of tube sag from this as well which seemed odd to me but it sounded phenomenal. If anyone has success with this be sure to let me know!.