When the Music Stops - Decepticon Hideout

This week we visit the Transformerverse during it's mid-Eighties difficult-second-album phase, as Optimus Prime and Megatron have gone, and in their place stand the New Leaders; Ultra Magnus and Galvatron. This was odd, because these Movie-era Ladybird adventures chose to eschew the movie more or less, and took their cues from the Marvel UK comic that Simon Furman was having so much fun writing at the time. In this story, the Autobots discover that the Decepticons are constructing a hidden base, very near their own - will they be able to stop them in time, before the Decepticons strike?