The Newest Errata was posted up and states that TAG now has this new bit of wording (end of PAGE 21 for BMM, and 142 for TW):
Arm flipping (see p. 24) or torso-twisting (see p. 25) can be made immediately prior to firing TAG. This prevents any
further use of such in that turn’s Weapon Attack Phase.
Rotating the firing arcs (see p. 105) or arm flipping (see p. 106) can be performed immediately prior to firing TAG. This prevents any further use of such in that turn’s Weapon Attack Phase.
I am going to assume this means that if the Arms are Flipped they stay flipped for the Combat Phase, and if a Mech Torso Twists to the Right they cannot then again Torso twist to the Left in the Weapon phase. Is that the meaning of the wording?