I am thinking about the possibility of modifying the chute. They are in the power plant, after all. Maybe there could be lots of electrical bolts and currents down there.
EDIT: Episode 2 is 10 years later than Episode 1. Work on a cybernetic Maul needs to be done in Episode 1's time frame. Unless they had Maul's body in some kind of Bacta-stasis the whole time.