I modified it to use the original "infiniturbo" and "it" for using it.  So you can do a "/it stacking" or "/it on"
Added "/turbolock" so you can just bind that to a key for locking turbo, I had that on an alias etc, now just use that on the same key bind.
Made the plugin adjust the stacking speed by using a + or - number like this:  /it 20"  That would change the stacking speed to 100m/s from the default of 80m/s.  If you do a "/it stacking" it will set the speed back to the default of 80m/s.  This is handy for alts that have to use the slower locust swarms etc.  Just use a "/it -5" for 75m/s.

Its got a lua error

Post the error from your errors.log file.  I'll see what's going on.