I could give you some measurements that you might be able to work with.....I have a couple of slide calipers so I can get it pretty exact and I have a digital one that can be super precise but I am sure you need the GH to really get things figured out and tested.....let me know if I can give you some measurements. Also, I think you could design a cool silicone mouth guard for more extreme temperatures and vaping with some sort of cooling spiral or something........I'm not sure what of the limits with 3d printing but I've got a 100 ideas for the GH and other vapes, the Crafty/mighty, herbalizer etc.......
So far, so good. The GH is a champ and I think they will be very reliable but you still need to be careful. They tend to roll and they have some heft, so they are easily dropped but I have great confidence in the GH, certainly more than any other vape out there with the possible exception of the Elevape SV and Volcano etc...I think the weak point of the GH is the On/off assembly because that is a mechanical part and they wear over time but that can be swapped out and the batteries plastic can be damaged which can make them mail function but other than that, I've got HIGH hopes for the GH!