Did a tour of the Raven Industries rotomold facility in Sioux Falls SD in
2000 or so.

Probably a nice place in the winter--it gets COLD in SD, but this was July
and it
was way past pleasant, especially when they opened up the oven for the
cooling cycle.
Fun and interesting to watch several molds rotating through 3 axis motion on
the
mechanism in the oven. Biggest setup was fairly large, had molds on it
for large "nurse tanks" used for ag spraying.

Fun part of the tour was the balloon facility. IIRC the assemble table was
800 ft long.