Henry
Autoexreginated
Keep in mind: Three steps forward and two-and-a-half steps backwards is STILL a half-step forward. 
Tinker gnomes are meant in the novels as much for comic relief as the kender are more than anything. As a regular campaign element, I would say that they do have inventions that work, but they are always suboptimal. Even in the Dragonlance Adventures rules for Tinker Gnome gear, it could work, even if it was ten times bigger than normal and had lots of bell and whistles.
Remember Doc Brown's refrigerator from Back to the Future III, the one that went through tons of sturm und drang for one ice cube? That's a good example of a Gnome invention.

Tinker gnomes are meant in the novels as much for comic relief as the kender are more than anything. As a regular campaign element, I would say that they do have inventions that work, but they are always suboptimal. Even in the Dragonlance Adventures rules for Tinker Gnome gear, it could work, even if it was ten times bigger than normal and had lots of bell and whistles.
Remember Doc Brown's refrigerator from Back to the Future III, the one that went through tons of sturm und drang for one ice cube? That's a good example of a Gnome invention.
