Rather late in the day (but not too late) I encountered a note from Vans about holes in the F1204 bulkhead. On some early kits (mine included) one hole was drilled too small, and another was missing altogether.
Picture 1 shows the large hole on the right drilled out as per Vans instructions, hence the lack of primer on the circumference - touched up later.
Picture 2 shows where a fourth hole is required. The note from Vans does not specify exactly where it must go. I had pilot drilled it in Picture 1. Apparently it is for wiring so the exact location is not critical.