Yes Jim,

I have taken the tank out and double checked the lines for inverted setup and also blown air to the tank and closed all link exits to verify if the positive pressure keeps there and after a minute, the pressure was there.
Likewise, I found the fuel link from the valve to the carb cracked right where it conects to the valve, what was adding bubbles to the fuel to the carb. Replaced but no improvement to the problem that I'm having now.
The needdle has a small plate that press the knob to avoid free rotation, so I'm safe about it.
I have played the valves a lot outside the stops from factory and at some point, I lost the original setup, that's why I requested the customer support for its values.

Next step I'm going to buy a new fuel 15%, another brand. Should I use any specific brand of fuel or glow plug, proved being good?
I heard that there are 4 types of glow plug, indicated for each methanol concentrations. I looked for this value in my fuel but found the Nitro 15% indication, not the Methanol %.Would this "cold" or "hot" glow plug change the engine overall operation much?


Thanks,

Nilo