Nope, I don’t think so.
Side effects are a replaceable axle system designed to affect the center weight and performance of the yoyo.
Currently, STAX are merely a modular replaceable axle system. Other than different decorations, there are no real differences to affect performance. That isn’t to say that could change, because the option is there.
STAX are NOT interchangeable with One Drop side effects.
Those were and are still in the bigger bin, but are in a cardboard box and still inside their clear plastic cannister. I think both my Sine//Saw yoyos were stored that way, along with the Octave, “@” and the two Silly Goose yoyos as well as one of my two Sharps. I think the A-grade FX was in its own box still as well.
Wait… So if I sat two throws on a table, a chief and a sine//saw, you would take the sinesaw? Isn’t the chief supposed to be amazing? Or are you liking the sine because of the price?