i used to do recovery - lift n shift was quite easy really, coaches are hard ifyou have to low load them, but the best ( or worst ) are units on there side, you have some very heavy equipment at sparks iirc - some nice gear, have you got any large holmes overhead booms , i used a unit once , a renault magnum with a massive underlift, huge grids on the back to keep the fooker stable when using the twin over heads for righting commercials.

tis an art to right a unit without it going back over on you