HC, those helis are looking good! So much growth in three months' time. I've recently decided to give this genus a shot... I can only hope mine looks half as good as yours in three months.
What are your temps? Do you feed/fertilize?
Temps vary depending on season. All my highland plants are moved at night to experience temps in the 50's, but daytime may be between 75 and 90 F. And I feed all pitcher plants with Maxsea.