I've posted on this before, so maybe you've read some of that.
I know that KGN1 is the LP/gasoline ensign carb used on the WD45.
Now, the I&T book has a picture of both the KG1 and the KGn1. The latter can be seen at this link.
I wish I had a scan of the I&T book avaible, but I seam to think the KG1 was LP ONLY, which I do not see in the WD-WD45 parts book.