Building this nice little model. It has Indi tracks. However the instructions are very vague about how many to use on each side. Here is what i found. 2 big pieces #9, 4 Pieces of #10, and 14 of the loose little ones. You should add two loose ones to the bottom run of the tracks to give it enough length. Then around the rear idler use 6 loose. Tie these into a 10-9-10 then around the front idler with six more pieces.
So starting from the bottom, going around the back start witha 10-9-two loose-10-six loose-10-9-10-six loose. This should get you all the way around with no problem.
Also do not secure the rear idler wheel, it needs to move to accept the large guide teeth.
well i hope this helps, i will publish pictures when i am finished.
Good luck Bill