At all times!
Technique wise you should train as much as possible and obsorb as much as you can even if you use only one technique to finish of your opponent. It’s good to have versitily. Concept wise you should use wing chun principles 200% all the way from the onstart, only because wing chun IS a system of perpetual simplicity, and doesn’t matter what other techniques you know from other style, Wing chun principles will apply to any circumstance or technique.
Work on the principles, not the techniques that carry them.
:rolleyes: