I think Ron's covered everything pretty well here, but if you do want to email me with more specific questions, the easiest way is via the contact form on my band website (saves my email address being gleaned by spambots).

The link to the diagram showing how to wire the footswitch for tap tempo is here. The only difference to that with the G Major is that you need to use a latching footswitch, not a momentary one, for tap tempo (momentary ones send double signals and it gets confused). Also, I built the resistor into a custom TS-TRS cable so I could use an unmodified footswitch - if you're not comfortable doing minor soldering mods, I could make you one up, although as I'm in the UK there are probably cheaper options!

Thanks for the info, gentlemen. I will get back to you if I have any further questions. Looking forward to getting started on this!

Just for an update on this, turns out the G Major 2 doesn't perform so well with my Peavey 6505 or 6505+. I get a noticeable low end drop when the GM2 is engaged in the fx loop, even when bypassed. I talked to the folks at Peavey and they told me the problem is the impedance on the GM2 is far too low to work transparently with my amps. Oh well.

So I now have another question. Could I use a delay pedal like the Boss DD7 in a parallel effects loop using a line mixer in order to keep my delay trails from getting cut off when I switch presets on my RG16, or is that sort of thing not possible with pedals and only possible with effects processors turned to 100% wet?

To get a parallel path through the line mixer, you will need to be able to set the delay to 100% wet. I'm not sure if the DD7 can do that. If the 6505 has problem with low impedances, even the line mixer might give you some trouble. (it has a 10k input impedance.)

It would be interesting to put a buffer between the amp's loop send and the input of the G-Major and see if that helps at all.

I fiddled around with this yesterday and the DD7 is definitely not capable of doing this. What sort of buffer would you recommend I use? I'm down to try stuff. I take every failure as a learning experience. haha

In a couple of weeks, we will have some buffer boards that we could put in a pedal type box.

Alternately, any clean boost pedal should do the job as well. I haven't used any personally since I am surrounded by buffers here.

The MXR / CAE 401 Boost / Line Driver is one of the cheaper boost / buffer pedals around, it's built like a tank and it's very transparent and great sounding. I can certainly recommend it. I currently use mine in front of the amp as a gain pusher, but I'm looking at getting another for in the loop.