So I've been screwing around with this thing casually, and it's really fun. Not sure it's vintage-level power, naturally. But, it can be tutored out and then it gives you a useful mana sink turn after turn. If you get Sai, Master Thopterist going with it or happen to be running other Thopters, it gets really powerful.
The deck I stuck it in has Ornithopters, Roterothopter, and Pilgrim's Eye. They're all pretty terrible, but Goblin Welder at least makes Eye sort of workable.