Use hte bord method. Or practice, or get one of thoes saws with the lazer line and look ahead instead of where the blade is at. This way corrections are minimal and gradual.
I like it better than a table saw when making the first cuts on a 4x8 sheet, I don't know about you, but handling a full sheet through a table saw with only one or two roller stands is a major *****...with a circular saw you don't need to worry about the blade jamming up because the board suddenly goes out of whack.
they need to come up with a 90 degree attachment for the front and rear edge of the guide. That would be a perfect setup if they did. I just bought a clamp that was like 70 bucks with the saw plate and I hate the saw plate. Maybe I will try it today, but its ****ing plastic.