WOW!!! You've got some info in there that will really shorten an engine's life and performance quite a bit if not kill it outright.
NEVER break in an engine by free-idling. DON'T keep it at a very low temp and running rich. That's the old-school way and it has been shown to no longer be the best way to break in an engine. You want to get the engine up to operating temp (200°F - 240°F) as soon as possible and keep it there for 3 minutes running at no more than 1/4 throttle. Now shut down the engine, put the piston to BDC and let it cool completely. Do this over and over until you have around 25 minutes of runtime on the engine and then repeat it all over again but going up to 1/2 throttle. After the next 25 minutes is passed your engine should be nicely broken in.
This is known as the heat-cycling method and with the materials that are in use nowadays is the best way to break in your new engine. It can take a while to do right but it is well worth it.
Pinch the pipe line(the fuel line going from your tank to you exhaust pipe). While plugging the exhaust turn the engine while watching the fuel line for any movement.
I don't get this part. If you pinch off the pressure line why would you also plug the stinger? There is no need to touch the pressure line when priming. Plug the stinger and turn over the engine until the fuel just reaches the carb. Turn it over 2 more times and you are all set.
Start off by driving around at full throttle on some flat ground.
NEVER tell a newbie to start off at full throttle. You never want to do anything other than brief bursts of WOT. 3-5 seconds at the most...unless you like broken conrods and shot bearings. Sure you can do high speed passes, but not full on WOT for extended periods of time.
I can appreciate the fact that you are trying to help as many people as you can, but please make sure that you are not passing on info that is either out of date or simply harmful to
THEIR equipment. I've been into RC for 20+ years now and the changes that have come about are amazing. Everyone must update their information from time to time keep up to date.
Enjoymentboy