Yep, from all I've read online, recording the LiveView feed at 5x zoom is reportedly the best way to do it - unfortunately I don't believe you can record this inside the camera, it has to be done via USB directly onto a computer. Backyard EOS has a dedicated window for this, as well as windows for more normal astrophotography and focus assistance and alignment. You can use it for free for a month if you want to try it, otherwise the free app
EOS Camera Movie Record will also do the job, but with less bells and whistles.
My
best image of Jupiter was taken this way, on my 6" SCT and Evolution mount. I took 5000 frames at 20fps over about 4 minutes, stacked it in AS!3, sharpened in Registax and a bit more processing in Photoshop.
Here is a discussion that was had on the
CN forum site a couple of years ago which you might find interesting. BQ Octantis (also in Oz) also uses the eyepiece projection method, while I use the direct in-line approach. I think the takeout from this is that if you want to improve your images (which are already pretty good btw), you will need to record the 5x zoom from Liveview onto a dedicated computer.
Hope this helps,
Andrew