Ok I've ran my vehicle thru a few tanks and I want to tune it. I see the 2 needles for tuning but the directions show a different engine than the one installed. Question my 2 needles are side by side ..... Which is which? is the HSN on the left or right? also I've noticed when I start it my choke has to stay at 1/2 to 3/4 on for it to continue to run or even start it. Is this normal? Forgive me if this seems like a stupid question, but this is my first gasser. LOL I can tune and Nitro with my eyes close and never had to use a choke on a nitro. LOL any help you guys could give me on tuning this engine I'd really appreciate it.