This model has been tested, with a Torque Tuned motor in a Super X Chassis. To print the complete model you will need to print 2 entries, and 7 loop sections. they should clip together with lane clips and have a support tab under the track to help support the track when a car goes thru the loop. I would also suggest taping the sections together as is tradition. The entry track transitions from 115mm wide to 120mm wide. The loop sections are 120mm wide. Each of the loop sections transitions to the left 20mm so it is enough for the loop to clear itself.