All very goo advice, way ahead of your brother, I have a 5gal pale of kleen-flo carb and parts cleaner, shit reeks to high heaven. I'm ordering everything I need on Tuesday, I do need to get a carb sync tool though.
Oh and btw I paid the shop $200. It did have a spark problem so that got fixed. But other than that I do t think they did much, new plugs yes new fuel no. Still pretty pissed