Brothers Brick posted an article about Alan Yap’s custom alternate build of Lego 70842 Emmet’s Triple Decker Couch Mech. Alan used only the pieces in this set to make a Lego Perceptor that transforms. Instructions are free. But the instructions for the head weren’t there. Alanyuppie's LEGO Transformers: Instructions for LEGO Transformer Microscope from set 70842: Emmet's Couch Mech! As I said there were no instructions on how to build the head so take a look at these pictures below from Alan Yap. I couldn’t figure out how to make the shoulder cannon pose like this. So Alan Yap took a photo of the back. See picture below.