That does not work because if I reflect X -100 on the armor, it still sticks to the right arm, so the morphs are all messed up. What works is duplicating the character parenting them to the base character, hiding them and reflecting them, but then I have to indivudally pose both characters separately which is a hassle and a half.
EDIT: Welp I just converted the genesis 8 armor to genesis 9 and used the g9 geometry mirror script instead and it works.