Adapter: A couple pages back there is a name of the store - Horizon, or something like that.
Glow fuel: There is no good or bad. Like I wrote 2:1 on gas and 10/10 is starting point. You can try anything. It's all this threat is about

back to my experiment.

I finished the spacer for cylinder in my Poulan. Now it is in the same position as before about 0.8mm higher. Also I modified my test stand to include all equipment (Amp- and Volt-metter) and variable resistor-wire. I found some 0.3mm piano wire that allows me to drop the current below 0.4A - the point where the current that measures glow plug's resistance doesn't heat it any more (31 mW). I added more measurment points to OS F characteristic (the picture below). At the same time I found very BIG PROBLEM in my setup.

When I started my measurments, the results were way off, compared to values taken a couple days ago. The glow plug resistance was over 500miliohm higher [X(]. Then I found, the connection on glow plug "cup" (connector) was not 100% solid. It is a spring loaded connector and obviously contact is not good enough. If I use it all of the precision controll from with Nelson's driver will go south. I have to fix my plug connector so it does not introduce any resistance into the circuit.