Hey need some advice? I've been vaping for about 2-3 months now. Started on a istick 20 w and a nautilus mini. Loved the set up taste.....but wanted more. This week I Sold that setup to a buddy and picked up a istick 50w and the kanger subtank. I have to say I was disappointed with the taste/flavor of the Subtank. I have tried rebuilding the subtank used both the .5 and 1.2 supplies atomizers to no prevale. It just does not give me the juice flavor of the nautilus. I would like to hear your experiance on the Russian 91 (I hear the flavor is awesome) compared to the nautilus. I am willing to spend the extra $ to buy the 91 and forgo the cost to replace the nautilus heads. Thoughts?