[m0xte]

Yeah no worries. We’re all hyper critical. Need to outline the dangers because people who are unaware of the issues working with mains tend to be the first to drop dead. This is followed by the people who suffer from Dunning-Kruger effect. Us amateur radio operators like to kill ourselves on vintage power amplifiers doing that.

The output resistor need to handle potential to ground so say 7kv across output to ground. Resistor is rated for 200V working voltage. Usually you use a chain of many smaller resistors here.

I haven’t reviewed the design entirely but the main problem is the enclosure and mains connection and the component choice. The mains connection should be clamped in the enclosure and either spade connections or screw terminals or ferrules. The enclosure should be double insulated. As mentioned a fuse would be a good idea as well.

Always design for worst case with these things.