OK, All this info is good.
Now, unlike a 2 needle valve setup, the Regulator screw which affects the transition, the Regulator screw will also affect top end right?
So if I don't like my transition, you are saying that every time I mess w/ the Regulator screw, I reset my top end again before trying the transition?


Help me with my procedure here:
Bring up to full throttle and Set top end slightly rich
Try the transition from idle
If sputtters, then comes up to speed or dies, turn regulator screw inwards (CW) (how much?), then set mixture needle at high end again (slightly rich) and try again.
If slowly comes up to speed, or dies, turn regulator screw outwards (CCW) (how much?), then set mixture needle at high end again (slightly rich) and try again.

I had 15% nitro fuel 20% synthtic-castor blend fuel I was using for this initial start.
I recall running 20%-25% back when I used to fly it.

I also have a gallon of 30% Nitro 20% oil heli fuel left

What fuel should I run normally? I don't need that much power for what this is going into (Scale Spitfire)
If I use 20% Nitro 18%-20% oil, I could use that in my heli as well.