I just did the basics, oil, oil filter, air cleaner and pre cleaner, adjusted valves and replaced rocker gasket. I ran it for around two hours and it ran perfectly. Apart from checking things periodically whilst using it, I checked the oil level again this morning and it was where I filled it to yesterday. It was also the same red tinge the 30 weight Briggs spec oil  normally is. 
Just keep monitoring it whilst using it or perhaps try a compression reading? 
It seems to behave very well.