You didn't go into why you wanted to remove the body, its also worth watching the second part of Edd's video which replaces the chassis and puts the body back on the chassis.
22 Plus Four KIMI 12 Plus 4 Sport OZZY 08 Roadster FELIX 06 4/4 70th LOKI 77 4/4 SEAMUS 85 4/4 MOLLY