Lint, thanks again for your help mate but it seems the connection was faulty. Luckily I have managed to identify and fix up the problem!
Basically, the piece of grey plastic that is behind his chest connector... is actually a seperate piece from the rest of his chest. It's actually connected to the same apparatus his wings are on.
On my Seawing, this piece was warped and skewed over to the left. I tried straightening it with a hair dryer and hot water but the results were very minimal. So instead I used a small piece of a match stick (I know, weird choice but close to me at the time) and wrapped it up in sticky tape until I had the desired thickness. I then wedged this in between the bit of plastic on the side and the bit that needed to be straightened. I used a little bit more sticky tape doubled up and placed it behind, as to wedge the piece forward slightly as well.
Once I screwed him all back together, voila! The connector piece is now longer loose and has the desired "snap" effect. I took a picture which I'll post if anyone wants to see, but I tell you what, there were a lot of parts on the inside that had stress marks! Especially where the screws go. Makes you wonder how many other figs are actually stressing in places where you can't actually see them!
Once again Lint I appreciate your response!
WANTS
G1 Vortex w/ weapons
Beast Wars Basic Rattrap head and gun