Made the fin aft spar doubler tonight. Dimensions are per the plans....but it does not look the same in assembly as the plans. The lower portion of the doubler is not the same width as the lower portion of the spar and 1/8" doubler. Looks funny, but structurally sound...so build on.
Fin spar Doubler
Width does not align with lower portion of spar, but per plans and should be okay......