UPDATE: I got the TRU MP Rodimus Prime matrix to fit inside Prime. It is easier to pull out Prime's matrix holder. Then use more force to wedge the matrix in. It is a tight fit, but it fits. It is a little harder to remove if the holder is in the chest. So remove the whole thing and pop out the matrix. Here is an updated pic of my matrices. I added my BTS G1 prime upgrade matrix, KO gold diecast matrix, and my Hybrid style convoy matrix. MP Rodimus made me want to pull all my Matrixes out and compare them. I thought TRU Rodimus came with MP Prime Matrix but it is a different mold. I havent been collecting the Takara MPs, besides Megs, but did the TRU MP Rodimus Matrix come with a later release of MP Prime? Back to Front: Madeinjapan Matrix, TRU MP Rodimus, DVD MP Prime, New Year Prime/Hotrod&Cyclonus two pack, Fans Project BT Convoy upgrade, MP Rodimus I tried to fit TRU MP Rodimus' matrix inside my MP Prime and it doesnt fit all the way in, it is a smidgen too wide.