Full Review of my Trusmt DSLR cage above. Made this review almost 2 moths ago and still stand by my words; this a really nice, solid, quality peace of kit, that I actually use quite a lot, especially when shooting with Cineroid EVF, (which unfortunately is not so good, review coming). One of the things I didn't mention in the review is the base plate on this cage. You probably know how annoying it is to change base plates when you switch rigs, let's say from a shoulder rig to a Steadicam or jib, everything tends to have different base plates and you end up having to swap them all the time. Good thing about the Trusmt base plate is that it has 3/8' and 1/4' holes at the bottom of it, allowing you can connect the base plate directly to another base plate or straight to another rig making the whole swap much quicker, at least one base plate always stays in place :) When done with your different setup you can quickly pop your DSLR back into the cage, love it.
Another thing I didn't talk about in the main review is the design of this cage. It really is very well designed with Canon 5D, 7D in mind (don't know how well other DSLRs will fit). There are openings on the top for access to top dials, buttons and display, side openings for card access and HDMI/Mic sockets; my favorite is the bottom access point for easy battery swap. It is such a time saver, comparing to the workflow on my Gini rig, where I have to slide the whole base plate out, disturbing the whole setup, especially the follow focus. So whenever I use the cage, it is pretty much all pleasure, except for occasional difficulty adjusting the top dials and buttons; while the openings are there, it is still pretty much covered on the top, so obviously access is not as straight forward as it is on bare camera. Saying that, the top plate can be taken off or moved back and forth on the top/side 15mm rods that can also be extended. That just the part of the flexibility offered by the care, not only the top plate can be removed, the side walls can be also take off, leaving you with a chunky base and your extension plate for your 15mm rods, which might be just what you need in certain situations, e.g. when you need your setup to be lighter.
Hope this helps. Any questions, feel free to ask.