i misspoke at one point and said mirror symmetry when i meant rotational symmetry but you get the idea
(i don't think i've ever used this before lol)
oops forgot to mention: this also works for the FF shape because that's just an E slice away from TT! (i mentioned this in the first take but my voice wasn't warmed up yet so i 丢 the video and rerecorded.)
tl;dw:
good U2 parity: reduce to 4a1 4e immediately (+6 to HTR) instead of trying to set up JJ trigger
bad U2 parity: U2 parity fix automatically creates JJ trigger (+7 to HTR)
cubes: weilong gts2m, guhong v3, tengyun v1
