Watch you don't make the same mistake as me.
On my printed B-Sheets I saw a cross at the corner of each sheet. My natural assumption was to align the crosses on 4 B-Sheets to make a bigger sheet, so I cropped them to the centre of the crosses. That seemed natural although it did seem odd that some of the plan lines extended beyond the cross centres, I even queried it here.
When I tried to line up the cropped B-Sheets it was clear that some parts that covered two sheets did not line up properly at the join. With measurements I realised that I was missing about 1/4" at each B-Sheet join. So, I looked at the original PDF and it all became clear, the crosses aren't crosses at all but radii.
If you look at the attached image, what I saw is (A), a cross so it seemed natural that the centre of the cross was the important point. But looking at the PDF I see that it is (B), not a cross at all but a radius and that the trim should be made not at the centre but at the outer edges.
A pity, but now that I know, it is not such a big deal on something as simple as the Wonder, but it would have been better not to make the mistake.