How the LSN works is the needle will go into the fuel output, with the shape of the needle, it will slow down the fuel output when you throttle down, the reason is you don't need as much fuel when you slow down, just enough to keep the engine going and at the same time, when you throttle up, you...
Changes are very minor once you tuned it, the key is to warm up in cold weather. We don't take our real car to tune up based on seasons. The Air is colder and it will take longer to tune up. Unless you are driving a NASCAR or something, to get the maximum performance between day and night time...
I wouldn't change much once the needles are set, I would just warm up to the operating temperature first and try to run it first, maybe minor adjustments after. Anything done before warm up is a waste of time. If you live in cold weather like me, even real car engine with run in fast idle until...
I never use pinch test to set my LSN. As long as it can idle without loaded when you go from idle to full throttle, it is all good. More fuel in the tank means the tank has higher fuel pressure to push fuel. I would not worry too much and enjoy. Each engine is different even from the same brand...