I also had one of these. I think I completed one of the designs included in the kit, but it broke apart relatively quickly. As alluded to in the article, it wa

I also had one of these. I think I completed one of the designs included in the kit, but it broke apart relatively quickly. As alluded to in the article, it was relatively easy to make a surface weld that didn't penetrate far into those little black plastic I-beams from the kit. From what I recall, the "welding rods" in the kit were the same ABS plastic that the I-beams were. I've got to wonder if a slightly harder plastic (or with a higher melting point) for the rods themselves would have worked better. Years later, I built another dragster from the Lego Technic 853 Car Chassis and the steering from the 854 Go-Kart.