Jake, not totally sure what you mean but I am going to email you my chart with the changes I used etc…I am including the chords on the all the songs I do now but when I started doing this I wasn’t so Sleepwalk is in this category.
After you do it with my chord chart let me know if you are still having the same problem and if you are p;ease be more specific as to what you are not jivin with.

I get it now! It’s totally correct. Tell him to play an A minor 7th. The A there is the 7th (his G)
This is exactly what I played in my version and it’s exactly what they play in the original.
It may be that it sounds a little weird with just you 2 guys but if he adds that 7th it will help. Also, his next chord should be F minor, not F major… this is a common mistake most guys do in this tune.