The blue bars effect at :41 is a Morph in the NC import of SS. The X value is set to 4%,95% The x,y values for morph are percentages, not fixed numbers.
For my 24 leg tree, I made up a spreadsheet of the % value needed for each leg so I can start a morph on any leg I need to.
If you want the effect to appear on all your legs, just change the Morph to x1a,x2a=0 and x1b,x2b=100.
A tree with 100 legs would have the first and last 3 legs empty if using 4,95 as the x values.