You can get the board on OSHPark. The full KiCAD project and LTSpice model is in my Github repo. There is a full BOM with digikey part numbers in the files section of this project and in the Github repo.

BTW, I tried reducing R_sense to 0.04Ω. The temperature of the transformer peaked at 160°F at an ambient of 70°. Still well below the absolute maximum of 257°F. I will produce a set of figures for this configuration too, as the supply can provide a lot more current with this lower value of R_sense

And the MOSFET:

A chart showing the maximum current for a given input and output voltage. I determined this from the readings that follow, by picking the maximum current I could measure before Vout started to be un-regulated. So another way of saying this is that it shows the maximum current for a regulated Vout.

There might be thermal issues with running at these maximum currents. I couldn't really measure that because my load resistors need some serious heat sinks added first.

In the readings below it is useful to note that for a given load and Vout, the output current remains constant regardless of the input voltage (until the output voltage becomes unregulated)

Readings for a Vout limit of 200V:

Readings for a Vout limit of 177V:

Here is my new test load rig. An extra resistor and a smaller form factor! I really need to get some heatsinks though. Or even better, an actual test load!

Here's a much more attractive test load being driven by a liitle LiPo battery: