Quote Originally Posted by DELTAprime View Post
Dam, no spare MP10 Matrix's laying around.
I just tried MP22's Matrix hands with New Year Special Convoy's die-cast Matrix; and it's a bit too small, but it should fit in there if you put little bits of Blu-Tac inside the finger grooves. Reissue Galvatron, Galvatron II and Reveal The Shield Battle In Space Rodimus v. Cyclonus all come with variations of the same die-cast Matrix.

Other toys' removable Matrices you might try include:
* Big Convoy; Ultra Mammoth (it would need to be held upside down though)
* MP01 Convoy/Optimus Prime; MP02 Ultra Magnus
* Galaxy Convoy/Cybertron Optimus Prime (Leader)
* MP Rodimus Convoy/Prime
* Hybrid Style G1 or Galaxy Convoy
^those last 3 might be too small, I'm not sure.