That alt mode looks really good. Universe Galvatron should definitely have been something like that.

I wonder if you could have used the legs of a different figure, to collapse the back end of the alt mode, instead of just having the whole legs hanging there. Classics Jetfire's legs come to mind, being the right size and shape for Galvatron, although it would require a lot of modding at the hip joints. Or even some beefed up Universe Cyclonus legs might work.

I guess those are all suggestions for another time though. Great work.