Kcdub1000, Thanks for refreshing this thread and putting in your findings on the CS800.
I ended up buying it late last year and have been impressed and not impressed with it at the same time. I found the same problems with the plug cover for the high/low settings for the carb. It's a real pain. I didn't install it right and ended up sucking way too much sawdust into the carb...ended up in the piston...and you bet, it blew that up. It was one of the best learning experiences though. I ordered a new piston and cylinder, and did my first engine rebuild. It runs great now.
Did you have to make any modifications to the new, larger carb to get it to fit? Also, now that you have some time after the port job, how do you think the saw reacted with that? I'm pretty interested in doing both of those to my saw.