Here's my FOC prowl from the FOC Jazz mold and an energon rodimus head. Fall of Cybertron Prowl Custom by Modified Ninja - YouTube
Not bad for your 2nd custom. I see some leftover paint apps though. Might want to double check your stuff to clean it up and you are on your way my man. That Jazz mold was my 1st custom over 2 years ago and it remains one of my favorite lines to paint.
That's really REALLY nice! Fits the Jazz mold perfectly! I really like what you've done here... really looks the part