I concur, this is a much needed feature. The second hardest part of developing a VTOL, behind fuel balancing, is switching between different engine modes. Even having a hotkey for it would be stupidly helpful. +1ing This SO hard.
You beautiful, beautiful madman.
So today I started experimenting with trying to get something into a Geo-Sync orbit. I have failed tremendously. Further testing will be needed and I'll send up Jeb in a shuttle to clear up the mess of parts now in orbit.