When the TR volunteers started to dismantle Van 6's body for restoration, they discovered that two of the roof-sticks were a bit below standard, due [mainly] to rotten wood, plus the physical expansion that occurs when an iron nail rusts has started to induce splits.
We've made three new roof-sticks, and the better of the two originals can be repaired.
Once they have all been painted, I don't think you would be able to tell them apart ...