Thus far we have seen the evidence of 2 pre-production Glowforges in the usersphere. One has been widely documented and the our forum comrade has been quite forthcoming with information to the delight of many. Adam Savage received the other pre-production unit and did a nifty video which provided some very good insight.
However, Adam has not become a regular here on the forum (at least as far as I can see) … how 'bout it Adam --> join in on the fun! Brian