I drilled the ie down brackets first hole and then aligned the the brackets as per the plans. Clamped into place and ensuring they were square, I drilled the remaining holes.
I then marked out the holes postions on the tie down spacers and taped them into place using the marks to ensure correct alignment. I then bolted the bracket into place over the spacers and match drilled the corresponding holes through the spacers and the brackets.
(see next log entry for additional text and photos of same day)
Spacers marked out for correct alignment
Spacer markings visible through pilot holes in spar web
Spaces taped into position with bracket bolted on - holes match drilled.