OK, here's an updated BOM that reflects the updated schematic.
For over 35v operation, we just add the 24v Zener diode and no longer use the FET or 100K resistor.
For the updated schematic over 35V, add:
Yes, be sure to order 2ea of the capacitors, however I have run it without them and it seems to be OK. They are not critical values either, probably anything with a 35+V rating will work fine.
For under 35v, place a piece of wire through the 24v jumper holes. You can use a piece of wire snipped off of one of the resistors. The jumper goes here:
For over 35v, place the zener diode like this:
It won't hurt if the zener diode is installed and the 24v jumper is added. It will be in the under 35v mode with the jumper.
For odd voltages, the value of the zener might need to be changed. To calculate, take the highest output voltage for the supply the board is connected to, and subtract 35v. This is the value you should use for the zener. If this doesn't work out to an available value, use the next higher zener voltage. Multiple zeners can be put in series to increase voltage. Try to keep the input of the LM78L12 between 24v-35v.