If HobbyKing lifted the quality of the stainless body and tailpipe on their pulsejet engines they'd have a winner -- but sadly, this second unit appears to be even worse than the first one I bought. Both the tailpipe and the body are significantly ovalled, something that will affect the performance and, like the first unit that failed within 15 seconds of starting, this unit is also heavily ground along the weld seams so I hold little hope for its durability.
Stay tuned... I'll be running the second engine very soon and if manages to hold together whilst producing enough power, I'll throw it on the Mini Talon and fly it. Otherwise, out comes the metalworking gear and I'll have to make a whole new body for it.