Fix gFex simulation running issue
This MR fixes a problem with running the gFex simulation. gTowerMakerFromGfexTowers is needed at the beginning of the gFex simulation in order to create gTowers.
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This MR fixes a problem with running the gFex simulation. gTowerMakerFromGfexTowers is needed at the beginning of the gFex simulation in order to create gTowers.