Hi! I'm Aanchir, and I created this template.

This template is for building models on LDD that require part 57520 (the small sprocket wheel) and part 57518 (the tread).

To use this template:

1) Download the file
2) Remove one or more of the tread pieces that surround the sprocket wheel so that it's no longer a complete loop.
   I recommend removing one of the 60-degree tread pieces so there's a horizontal tread to connect to.
3) Connect as much extra tread as you need.
   A chain of horizontally-placed treads is provided for you to use or copy.

WARNING!
Clips on LDD do not like to center correctly!
There will usually be a left or right offset, which can do a lot of harm if all of your clips are offset in the same direction.
The chain of tread pieces may not be lined up at both ends!
To avoid this, use the green alignment tool included in the file.
Place new tread pieces on every other pin, then place tread pieces on the pins in-between.
The alignment tool is entirely in green so you can use the "color select" tool to select all its parts at once.
If you need to use green parts in your actual model, feel free to select the tool and change its color to something a color you will not be using.

4) Once you have the length of tread you need, you will need it to wrap it around the other wheels of your model.
   ALWAYS use the hinge tool to ensure the tread is wrapped snugly around each wheel.
   It may help to paint the treads TRANSPARENT so you can see how they align in the grooves.

5) Some sets and MOCs will have some "sag room" on their treads, or will have wheels that have to be rotated to align properly.
   I am not yet equipped to deal with either problem, but perhaps you will find your own solution.
   If the alignment goes smoothly, the last hinge rotation will make your length of tread link back up at the ends.
   Congratulations! You're done!

I hope this template proves useful.