I made that suggestion to slow down the eBay 555+4017 module for a traffic-light application. Aren't you using this for the Knight-Rider where the lights advance more quickly?
I suggest you apply power to the module as-is and see if the LEDs advance at a suitable speed for what your want. It appears that you have some speed adjustment with the on-board trimpot.
As for mods, for the Knight-Rider don't you want the lights sweeping back and forth? To get this effect you probably need to add some diodes after the 4017 as shown in the schematics earlier in this thread.
