2012-05-19: I made some simple tools in preparation for this step. The template is to be used to see when the spar-cap is filled. Then I made a 3″ wide squeege of an old credit-card, as well as a comb to use on the fiber-strands of the UNI to make them as straight as possible. I didn’t use the template since the masking (see the next picture) made it impossible. Instead I used a straight stick and checked when the cap was level with the foam by just holding it across the spar as I filled it up.
It said in the plans that this step should take 2-3 hours. I used 6 hours!