Yeah, you would need the 3.7v T1 core, and a way to cap it, or the HP LV Evolution modded core. You might be able to have an existing 6v core rewired, if you contact TV about it, for a small fee. I don't know if the cores are still available for sale anymore. They have a few parts left for sale on the website, not sure what all is left. my only regret is that I didn't have all this stuff sooner.