I haven't done this latest conversion yet.? ?and I guess there is nothing wrong with the zener kit - maybe I am lazy, it just took a while to bend and fit the zeners in and solder them up.? Your preassembled module is plug and play.? On the last conversion, I did play around with zener values and voltage levels.? And regarding the choke - someone with the electronics smarts will have to explain that..? maybe it is coincidence.. but my two previous conversions, if I did not replace the choke, the thing did not work.? the schematic shows a resistor in that part of the circuit so I put it in and it worked.??
Michael C