After checking all of the new parts against the standard Centre Spar, I noticed quite a discrepancy (about 3mm) on the depth of the top of this doubler. It was simply just too wide, so I just dragged out the 0.063 sheet and knocked up another.
As before, fold on the brake, then adust on the wooden blocks.
This one is spot on and although the first one was acceptable, this one is of a higher standard.
3:00 hours.