It works fine on a Nano+. I have a Nano+ with a Powermax (basically same as the DC7) mounted via a Grip. Fits with plenty of space.Update: The DC7 fits perfectly under the Nano with the GRIP.
Now I have another question! Will it work the same with a Nano Plus? For some inexplicable reason the Nano and Nano Max are 5.5" top to bottom but the Nano Plus is 5" only. I am hoping the space underneath is still the same width.