The X-22 is the best low cost Glidecam. It's actually better than the Steadicam Flyer I found. The arm can hold more weight too, although it lacks the no-tools lift adjustment that is on the Steadicam series. This is my review of the X-22.
http://www.simonwyndham.co.uk/glidecam-x-22-review.html

Now relisted the matte box.
http://www.ebay.co.uk/itm/330865955564

I have put up my Petroff 4x5 Matte Box up for sale. http://www.ebay.co.uk/itm/330860639301 This is a highly robust matte box designed for rugged use in the 35mm film production world, and is ideally suited for use on ENG cameras, FS100/700, F3, EX, F55 etc. It comes with two rotating filter stages, ...

I have put up my Libec zoom controller for EX cameras for sale on eBay. It is in great condition and has hardly been used. By removing the EX adaptor it can be used on any compatible lens/camera.
http://www.ebay.co.uk/itm/330858706120? ... 1555.l2649

Best way to match cameras is to bring the more capable camera down to the level of the less capable one. If you really did want to help the 7D along you could try the picture styles that are available from the same guys who make the digital praxis curves for the F900 etc. you need to pay a small fee...

Sounds a similar issue to the 1/2" EX camcorders. Could possibly be using some common parts hence the similar problem.

That just refers to the delivery format (which will vary from broadcaster to broadcaster) and not the original recording format. 50mb/s and above 8-bit should be acceptable by most depending on what exactly you are doing. You need to check with your broadcaster directly though. There's no point in a...

Why would the network reject 8 bit footage? Is 10-bit specified in their guidelines?

Yes. I found the back focus procedure to be quite variable in the results that I achieved. You have to make sure that there is nothing else in the frame that the camera could accidentally focus on too. Strangely the only way I got a good result was with the back focus chart supplied with Doug Jensen...

It's a long shot as it definitely sounds like either a lens or optics block issue. But have you tried going into the picture adjustment settings and methodically reducing the effect of each one in turn to a minimum to see if this has any effect?