Ah, they're doing what I had wanted for a long time, they're making the panel and tanks for the Buster version, so any Optimus can be converted. Nice. Took the 3rd parties long enough.
If UFO would make the abdomen change, plus the DOTM chest pieces, I'd be all over their stuff. I'd skip Amazon's Jetwing Optimus altogether and use their sets to fully convert my current, hand painted (by me) Optimus and just upgrade him to ultimate DOTM status.
If anyone from UFO is reading this...make those chest/abdomen pieces, and you have a guaranteed customer. I'd buy all the conversion sets.
NOTE: Realize that I am not a perfect Christian, nor do I profess to be. I apologize if anyone's ever offended by me, I'm not perfect. Don't hold my posts and opinions against other Christians.