Motorola VT-71 modification question

[bigaudioal]

Seen many posts regarding this set and selenium replacement and ballast replacing. The ballast rebuild seems easy (going with the capacitor/resistor network) as illustrated here back in 2012:

http://www.videokarma.org/attachment...9&d=1290802806

My question is concerning replacing the seleniums with diodes. I know the diodes have less resistance than the seleniums, so need to insert dropping resistors. My questions is where to insert them and do I need one for each diode? Also what are the specs of the dropping resistor(s) needed in addition to where to put them? Attached is a schematic showing each selenium as M1 and M2. Any assistance would be much appreciated.

Thanks.