I have a diagram that will allow you to use a standard single cylinder unit to drive a twin cylinder
system. It requires a 3 volt battery, I am using it on my A-26 this system ...it works..
Please send me your email address and I will send you a scan copy...
It is very simple..the output of the glow unit , goes to the + 3v, the - 3v goes to Glow plug # 1,
the common or neg. from the glow unit goes to Glow plug #2.. it works

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[.............................. ]......(+).....(+)=3 volt=battery=(-)...........GP#1
Glow
Unit

[.............................. ]......(-)................................................G P#2
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