Removed silicone mold from plastic mold and casted the 3 bracket pieces. Used a Teflon mat against an aluminum plate as an upper caul surface which worked amazingly, though it did add roughly .4mm to the part thickness. Demolded the brackets and cleaned them up with pliers and drilling. Glued the two-part piece together and filed them down as necessary to fit in the laminator. Was very lazy when installing these pieces in the laminator, and did not want to cut any wires and thread them thru. In the future I should put removable connectors on everything instead of solder. Eventually got the laminator mostly back together, also due to the size of the left hand bracket it did not close completely. Either way, it does manage to heat up PCBs to close to 200 degrees Farenheit. I also should have made 3x separate silicone molds, as it would have saved a lot of silicone. In addition, some small features at the bottom of the mold cavity did not resolve properly or at all likely due to bubbles remaining on the bottom. This could be fixed by having larger features at the bottom, degassing the polyurethane (hard because pot time is only 2 minutes), or vibrating the mold during cure. Otherwise this entire process was a pretty good success.