No need for a kill switch on the DD-6 when using the Reverse Delay because the dry signal can be dialed out by turning the Effects Level all the way up. This is a very smooth sounding delay after the mod. So with this mod you get 3 delay options, high-cut, more high-cut and stock unaffected delay affect. Makes an already great delay pedal even better and more versatile. Save yourself $26.00 to $46.00 and do this mod yourself! Plus, modding your own pedal is just plain fun and very self-satisfying.