I'm new here and not experienced at building a HH laser. But, I've been doing quite a bit of reading. I was thinking of building one for a NUBM44 diode. Here's what I can't quite figure out. I was thinking of using a Vape/MOD battery body. But, are there any that can be threaded together to house two 26650 batteries? I would want it to easily work with a threaded heatsink from DTR.