After a big rush at work, I finally had some time to work on this thing. It's something I had in my mind for a long time now and wanted to visualize it a bit. There was the jet pilder for the Mazinger Z jumbo, why not give Grendizer a back pack also? :))
This was modeled quite fast just to have an idea of proportions. Maybe one day I will optimize it for a 3D print and make it real. Problem might be the weight of it if you stick it to Grendizer's back.
Anyway; enjoy ;)