Hi Gremlin,
Really enjoying your build. I've got this kit as a future project but in the meantime am working on the 1/16 KT using David Parker's book as inspiration.
From what I've read in David's book the inner track teeth are certainly shorter to accommodate greater inside diameter of the drive sprocket. As a result I've been trimming each track link down individually, which is quite time consuming. However, the tracks may sit around the drive sprocket without trimming but it would pay to check.
Keep up the great work
Paul