My idea is to take Magmatron and give each of his individual components a working robot mode while still making combined form possible, any ideas?
Unfortuately no. I have yet to track down one for my collection so I don't have a reference to help you. I like the idea though. It will be interesting to see if what you come up with.
Interesting idea there. No idea how you'd pull it off, but I'm looking forward to seeing how it goes. Would you be going for proper Dinobots? In which case you rework the Skysaur into a pteranodon for Swoop, and the Seasaur into some form of sauropod (apatosaurus, brachiosaurus?) for Sludge...
How about this;see if you can find some old series 1 Beast Wars arms,legs,and if possible,heads;then customize them to the way you want them to look and attach them to the insides of the robot bodies so when they transform they "fold-out" almost like a shell-former.
im not sure yet though if Ido keep the elasmsaur mode it would be better fitting then that dimetrodon hasbro tried pulling on us