blending two IRs is a nice concept, doing this via the time knob is also a fun idea because it (again) is quick. I'd have liked some kind of indication where one IR starts and another ends but that's more out of curiosity. AND call me crazy but I like using this as a high pass filter only sometimes. simply disable everything but the high pass, set it to taste and then use the blend knob to blend a little of the filtered sub frequencies back in. I like it a lot.