Thanks for the reply chaps, I think the pictures make it look bigger than it is, the top picture doesn’t show the proper 1/10th lower casing the finished article for 1/10th wont be a tall or as wide as what’s pictured.
A hair dryer can of course be used but it doesn’t just heat the engine nor does it heat for long enough (without burning other items) to properly heat through the entire engine & of course not all tracks have power or people have generators, this works from a battery.
It comes with it own pouch / carry case so can be chucked in with the other items without risk of getting damaged.