Use the copy and paste feature. " Use the COPY and PASTE buttons to grab a Module and copy its data to another similar location. For example, you can copy and paste the settings of one stomp to another, either within the same Rig, or another Rig entirely. To do this, select a Module and press COPY. Next, select a destination Module and press PASTE. "
Copy B to C and A to B. Then once they are moved, put your desired effect in the A slot.
Well, don't I feel like a moron 
So simple. Thank you for the info, much appreciated.
Pressing the stomp button long you can also move the modules.
And welcome. 
Welcome Jakey, mate.
Pressing the stomp button long you can also move the modules.
And welcome.
yes.
COPY and PASTE is not necessarily, there is a MOVE feature as Ingolf pointed out.
( I use it all the time )
^^^ changed to 'STOMPS' for clarity
