Thanks for the help everyone. I've decided to order the 1" Kirk and the Sunwayfoto (Gitzo replacement clamp) from B&H. I liked the RRS stuff a lot and started an order, but it was $76 more to start for the two QR clamps and the shipping options where the deal breaker at another $30 with an uncertainty of USPS or UPS charging me brokerage fees entering Canada. I was already placing an order at B&H with shipping at only $9 and it remained the same price when the QRs where added.
Did RRS have a QR clamp to convert your Gitzo? Are you also getting an L-Bracket to attach that 1" kirk to with your sling strap? Maybe look at a Kirk also or eBay - lots of L-Brackets show up there.
Yes. I added a B2-Pro clamp with reducer bushing to a GH1780 (no QR), screws to the disc and pretty much covers it.
Like dcm mentioned, the RRS would thread onto the flat plate that is in my picture above, but for a cleaner look I had intended to thread the column on the ball to except 3/8 screws or reducer. The center of the column is drilled already to except a level and there is plenty of material to open the hole up the extra bit required for the 3/8 thread. I may still do that some day, and put the sunwayfoto on the lightweight traveler head that came with my Gitzo tripod.
ScubaX, I'm going to order the Kirk bottom plate when I place the order for everything else since it was available at B&H so I can combine the shipping (not free to Canada) and it actually looks more fitted than the RRS for a 7D. I thought about an L, but decided against the extra cost because I would like to get a 5DIII when the price drops further. If used are showing up, maybe that's an option. Thanks for mentioning it and I'll have a look. When the time comes, I probably won't sell the 7D anyway, as the selling price will be pretty low. Perhaps it will be a great gift someday for my oldest son who is making some really cool stop-motion and better photos than me with nothing but an ipod - gear can't replace imagination!