Read the instruction for the trim motor and began the process of utilizing the pieces of aluminum from the RV 6 kit. All measured the same thickness, size and etc.
I decided to use the pieces and complete the trim installation.
The rivets sent with the bag from Vans were AN426 3-3 and the plans called for AN426 3-3.5 I found the rivets from the previous RV 6 and used them to secure backing plate to the elevator skin.