Predaking
Predaking is partly the reason why I started this site. He is my favorite gestalt as well as my favorite Transformer, period (I'm still trying to complete my own).. I was disappointed with the Tech in the instruction manuals of the individual Predacons. The kind folks at R.I.D. Toys provided me with a sized-down image that they use for their excellent custom T-shirts. I believe the scan came from either a Japanese catalog or a book. I doubt that they made an actual giftset of all five, but if they did, I'd be gettin' it :). This spec was my second, and, although there are some problems, I believe it came out rather well.
*Update* I have been informed that there IS a Predaking giftset. You can see pictures of it here. Thanks to Hoc Bui for the pics.
Credits
Predaking image: R.obots I.n D.isguise
Predaking Tech Spec text: International Transformer Tech Spec Archive
Base Tech image: Razorclaw's Tech Spec from the International Transformer Tech Spec Archive