I just retuned a pair about a week ago. I was lent a trial pair from TweekGeeks with the caveat that they seem to work about half the time. It depends on the speakers crossover, I believe. If it employs a Zobel type crossover, then it will have little to no effect.
My Tonians may have that type of crossover or maybe because the main driver runs full range and the super tweeter merely adds to the very highest of frequencies (which would require a simpler crossover?), it didn't improve anything.
You only have the cost of sending them back if they don't work so it might be worth your while.
All the best,
Nonoise