The Burellian engineers travel to UEK with their prototypes Nos. 2-5 (1 was destroyed by a dumbass.) The No. 3 prototype supports a superior tolerance level to pressure, heat, and running power than does all the others, including the Elmic models, however, most Elmic models are much more efficient and lighter, however require more maintenance and can fall apart with more stress.
Additionally, Burellis brings over a load of coal as a courtesy of the project in order to test the types of coal brought over from Drulland.