http://www.nj7p.org/Tubes/PDFs/Frank...ania/6BK4C.pdf
It has a warning about "close range" ,not sure how to define that.
The set has a 6bk4c vs a 6bk4b as it was built for, which is an improvement.
And it's pointed backwards horizontally in it's own section at the top of the HV box.
Much like the CTC-16(XL), which has it mounted vertically behind the HV box also walled in it's own section with no top, oddly enough.
So the way I sort of see it, using the improved tubes over what was originally designed, 3A3A->3A3C & 6Bk4B → 6Bk4C, any risk should be minimal, for instance what is the difference in this situation with the shunt top open facing backwards ( back on set ), and the CTC-16 line with it pointing up?
Perhaps... don't sit on top of a CTC-16, or you will glow in the dark!
