I just purchased the go .21 3 port sport engine. I'm newer to nitro so want to stick to basic spec type 3 port motors for now. Do they stay tuned pretty well? Also when I crank it for the first time,will the needle settings be fairly close?I have an rd logics .21 that is running really well and have finished well with it cause I can control it and everyone else is way over powered. I also have a sportwerks .26 that the settings were not even close. Just wondering how close the factory settings were at initial break in. Thanks for all your help