And what effects unit are you using with it with your mark? I am wanting to get a floor based effects unit (blasphemy!) and would like to be able to ditch my footswitch at the same time.
I am using a MAG, a mini effects gizmo, and a Tc Electronic G -sys with my Mark V. Pedals: Barber Tone Press, BB Preamp, Earthquaker Device Sea Machine, vortek flanger and ISP Decimator. All pedals are running through the mini effects gizmo. Also, i have many buufers: 2 Sunday Drivers and an Rjm Tone saver.
I use the Mini Amp Gizmo in a rack with TC G System (also in the rack) and TC Nova Drive (in the rack). I have 2 Roland expression pedals and a Cornish LD3 (buffer) on the floor with the G System switcher unit.
One piece of advise. I'd advise picking up a spare connector cable from RJM.
Other than that, the MAG is built like a tank and works great with the MKV and G System.
The guy I was getting the m13 from flaked, but I have one coming in the mail Friday. Did the zz four pay. That will give me time to figure it out, and then get the Gizmo. I can forget to get an expression pedal though.....
I use the Mini Amp Gizmo with a TC G-System and a TC Nova Drive, all in a rack. The MAG works flawlessly with the G-System, is very intuitive to use, and generally makes my life easier on stage.