Plans page 43 shows a doubler/spacer on each side of the spar in addition to the spar web. I understand the need for the spacer on the side without the web, but is the spacer on the web side needed? Are they there to provide a specific dimension between the fittings, or is it for structural reasons? I plan on using separate wing attach bolts so I won't need the fittings to overlap per the plans.
