Hi Darren,
Gas rams are a Marmite thing. I love them, many hate them. Most would agree that the firing cycle of a rammer can be quite different from a springer though. One thing to remember, a replacement gas strut for your Tracker will be a sealed unit, if it's over power/under power/leaks, there isn't much that you can do about it.
As a newbie, you might be better served staying spring-powered and seeking advice on how to tune your rifle to make it a little less agricultural. All the best...