Modding a Boss RV-5 for kill dry/100%

[beedoola]

The Level control is a level; not a mix, so you can't get total wet signal - you can running through in and outputs B but then you loose the ability to control the dry/mix. I want to install a switch (if it will work) where I can change between using the RV-5 in regular mode and then flip the switch and cut the dry signal out. Anyone have any suggestions/ideas?

[beedoola]

anyone?