looks awesome! i like it..though youre right, the rears need a spacer.
Also, the mechanic is right in that he wound it all the way down..that will lower the car. The higher the collar, the higher the car.
You have to think of it like..the springs have their spring rates, you cant raise the collar and have the car drop lower. The springs will push the car higher as you raise the collar.
Sorry if i dont make sense but yeah lol..and yes i think he put it upside down. My KW's have the collar at the top.