I am looking to add a flanger to my growing collection of small noise boxes, and MXR's offerings have caught my eye. The M152 Micro Flanger supposedly is based on the same "stuff" as the older M117. I can see for myself that the M117 is bigger and has four knobs for more tweakability; the M152 is smaller and has only two knobs. My board space is limited, but that's OK since I often swap pedals in and out as my mood swings. Has anyone done a side by side between these two flangers? I am looking for advice on choosing between them, or picking another flanger. Help appreciated.