here is the deal..seen as how nobody ever gets a complete answer when a question is asked on this forum.................12 inches from nearest point of attachment is the riser and its 12 inches regardless of what is attached.

example....quick disconnect, stabilizer and say a simms vibration end all must be 12 inches or less from the riser............it does not matter how much stuff is attached it all must be 12 or less inches..............

hope this helps............................................. ........................