Im posting this here and the Express sub forum, hopefully someone between the two could answer this. First, I have owned an Express for quite some time, but I just added a series two Rect o verb to the lineup. The foot switch was included but often has an issue with channel selection where engaging the switch changes channels, but does it twice. The correct channel still engages but there is a delay as it happens. It seems to be in the individual switch itself (mounted on the foot switch). The Express foot switch has the same buttons, same style cord, etc. I'm wondering if I could use the foot switch from the Express to control the ROV. The layout is the same left to right (channel, reverb) for both with the exception of the third switch - on the Express, it controls contour on/off; and on the ROV, it controls the solo boost on/off. Anyone have any knowledge on this, other than the obvious "call Mesa?"