Below, import a .tmd5 file from Treemaker If you don't have one but you want to try out this tool,
you can download and reupload this one
Click and drag the circles around
If you want to find a more tight (optimal) packing,
you can let the square shrink until it can't shrink further
(You want the scale number to be as large as possible)
If you have a lot of invalid (red) paths,
you can let the square expand to make more room