That is awesome, Harmonic! I have been trying to think of a way to get a different tip on a Grande, and your solution is genius. Costwise, it won't be prudent to buy Stones and Grandes one for one, but if the tank can be be used again and again as the coil dies, this may just be the ticket... Or perhaps the top of the stone can be forced to thread onto the Grande.....I see a Gotvapes purchase in my near future...