Snow groomer features lifting snow plow by turning gear on the roof of cab and lifting rear blade by turning lever behind engine cover. Since set 42094 contains just one linear actuator and no worm gears I used two shock absorbers to keep rear blade in two positions - up and down. Although building instructions are easy to follow there are few challenging steps. It is important to set gears correctly in page 22 to get lifting of rear blade working fine. Building instructions can be bought exclusively from rebrickable.com where you will be redirected after clicking on "Download instructions".