Hello everyone! I'm new here and I thought I'd post my POTP Prime mods as I have done a few things to this figure and have few more things planned. If you're comfortable with an xacto blade and a figure meeting then I highly recommend this. First the Matrix, pop out the orange piece and cut off the squared edges with the knife and sand. I had to repaint my orange because my blade slipped and scuffed the paint, besides the blue on mine was already kinda bleeding through, then cut the two bars of plastic that were on either side of the Matrix in its square shape out. Then put the Matrix back in and trim the excess plastic from the titan knub that is the head on all the titan master figures to make it flush to the main body. I glued in my orange matrix center as I have no intention of swapping it out. I also sanded all the faces of the matrix very lightly so that it would be easier to put in and take out of Primes chest and applied silver sharpie to the panel lining and then a coat of mod podge to prevent rub of the new orange and the silver which required more sanding to make it fit afterward. I also cut that strange long clear blue piece coming out of the back of the Matrix to make it sit flush on a flat surface. Then for the head articulation. If you look down on the figure from above you will see a half hexagon shape in the outer Prime armor while the plate the Optimus head is on is square. So if you try to move his head up the plastic on the armor bumps into the neck plate. So shave the neck plate down as shown in the picture and you will have full range of motion! I also applied silver sharpie to the Prime windshields and the Pax windshields, the gun ribbing and the grill all of which were sealed with mod podge. WARNING I SCUFFED MY FIGURE'S FACEPLATE WHILE DOING THE NECK MOD AND HAD TO MAKE A NEW ONE FROM FOIL TAPE COVERED WITH SILVER SHARPIE TO MATCH THE REST OF THE PLASTIC AND MATTE COATED WITH MOD PODGE! BE CAREFUL! I plan to paint the upper lights as seen on the TRU MP-10 in yellow as they were omitted on this figure. I also need a new shoulder logo, raised if possible, if anyone has an idea for that please let me know! If you do end up doing this please post your results here along with any of your own custom mods!