If you haven't done so already go pre-order the ipv4. Temp control (should work if judging by the Yihi M class) Plus you can get it from this place that was on vapingcheap.com iPV4 100 Watt Box Mod for 74.95 that includes free shipping plus you can get an extra 10% off. I am so stoked about this device it's all I can think about! I have a feeling my istick 50 will be in the box after I get this.