Then you level the level that they have you put in the floor under the front cowl corners. Then they have you string up some plumb bobs from the front corners down to the top of the level. Once the cowl is centered on the fuse, they have you mark the bob location on the level and measure from there up to the front corners of the cowl to ensure that the distances match. The directions are pretty vague here leaving you to scratch your head on what they want you to do.
Next they want you to fab up these spacers that space the front cowl aft of the spinner backplate. They call out wood. These things have some weird radius' and particular dimensions. I decided to just throw the job on the 3D printer instead. Instant spacer blocks with perfect dimensions and no cussing!