Well im taking the plunge, I get my Nexstar on Tuesday!!

I have download all the manuals for the Nexstar and have been reading them over, But I have a question hopefully someone can answer.
The engine Manual says to run in the engine, But the guy at the hobby shop said the the engine is all ready run in from the factory (Im getting the RTF model). so do I have to run in the engine? if so How?

Thanks for any answers!

Justin