As title say, is it possible to switch to the missor class, having the right alignment, without picking a second combat style?

Cause when i try the quest it ask me if i want to change to light/dark side, and after the 2 confirm, it move to the part where it ask for the second style. There isnt a "no" chance and if i ESC it, even the first part get "cancelled".

Swapping your original class is only available to force users as a single time option as part of the mission to obtain a second class.