Vanalen, GGTB takes 17mm batteries but not all 17mm batteries. So if I make a 18mm internal diameter of this new 18350 GG then it will take some but not all 18350 batterties. So I need 19mm hole, so 22 external diameter. Thats 2mm more than the external diameter of GGTB.
It will not be like GGTS, I have other plans for it inq!