I've seen 100's of spits but never one like that.thats more like an oven.
Thinking about it.we cheat too,down here people cook em in a bakers oven then put them on a spit over a fire for the last hour.but it looks good to the people buying.
Good money spit roasting pigs.about £5/6 a roll here and about £100 for a 75kg pig.