That's looking very good indeed. So, what kind of engine are we looking at? I'd guess it's a military engine based on the core of one of the engines for the 787 or A380 (different, multi-stage, low by-pass ratio fan with afterburner on the back - and likely some material changes for the harsher military operating environment). I'd hazard a guess that you're using a nozzle from a next scale larger F-16 or F-15.