The CoreBooster is another one of those models that came about because of spare parts being left in my parts box. This model is made from the remains of one of my first Gundam models, the Ex-S Gundam BST. The BST suffered quite a bit of damage over the years from various moves from room to room. It also didn't help that Bandai made the entire Sentinel series of models from a brittle, puke-green plastic. While they were pretty to look at, these models had a tendency for parts to snap off, like the legs and backpack. Upon aquiring a non-BST Ex-S Gundam from Prabal Nandy several years ago, I decided to part out the BST. The few remaining parts found themselves back together in this kitbash, the CoreBooster.