I bought the L30 GEN I when it was available, but a few weeks ago I found that GEN II on their official website. So I mailed them to know if it would be possible to buy a 21700 body tube only. However their answer was a bit disappointing: the new 21700 body would be incompatible with the old L30 GEN I. And of course I’m not going to buy the GEN II…no reason to do so.