I have a CH ignition available. Can I just plug-n-play or does something else need to be done to the engine to make it work, such as re-position the Hall sensor?

I'm still using the stock muffler. I got the Snuffler and connected it to the stock muffler with some large silicone tubing, but it really messed up the tuning and I didn't want to fool around with it in the cold weather. Still got the 4-blade prop and will do more experimentation with that when the weather warms up.