Caps in Series

In addition to previous points re resistors to force voltaeg division:

1) AC voltage should divide equally IF the caps are equal.  Usually caps are
+/- 10% so even equal caps aren't.

2) Especially in cases like this, a safety gap across _each_ is a good idea.
Nothing elaborate, just some bits of wire far enough apart to not normally arc
over.  (IMO, safety gaps across everything with voltage across it are not a bad
idea, saving "rapid disassembly" if the power gets to the wrong place....)

(and it can be properly said that this is just one more complexification that
can be avoided by using, if need be building, the right thing in the first