Sunburst Yellow is a good match for the later PM saws, I found some Industrial Yellow (Krylon?) that was a pretty good match for the older yellow saws. I have found it necessary to apply one color first then a light coat of a darker (or lighter) one to try and match to old saws.
I like semi-chisel for all day cutting, particularly on the bigger saws when I will be cutting a large trunk that may have some rotten spots as they always seem to collect some dirt. Chisel is faster initially, but it falls off pretty quickly if the wood you are cutting has any dirt in the bark. When cutting big old cottonwood trees I may resort to chopping the bark off with an axe rather than dulling a chain or two just to block off a large round.
I am currently going through a Titan 50 for one of the fellows at work, looks like someone may have replaced the fuel lines but the oil lines were disintegrating like they always do on these Italian Mac's.
All cleaned up now, hopefully I will put it back together on Monday. The first time you work on one of these you swear you will never look at one again, but once you learn how they work they are not so bad. The coil wire was pretty loose so I will have to fix that.
Mark