Step 1: Materials
I added some pennies later on...
Step 2: Sharpen Pencils.
Step 3: Cut Pencils to Length.
I'm using some fairly specialized tools to do this: My tube-cutting jig and a jeweler's saw. Any other method will work, but I wanted a reasonable amount of consistency.
Set the back stop on the jig to 1/2", insert the pencil against the stop and engage the hold-down lever. Then cut through with the saw.
If you lose one or two, no worries, just chuck it up and resharpen.
Step 4: Assemble Stylus.
After thinking on it a bit, I decided to add more tape to kinda ensconce the leads, because there was no way they would stick by themselves, and I didn't want the possibility of the paper sticking to the tape.
Step 5: Assemble Device.
Step 6: Something Not Quite Right....
Ok, now close it up and...
Step 7: Get Out There and Walk Out Some Art.
Step 8: Results.
But don't tell anybody...
I had this in my front pocket at work for 8 hours after the modification.
Step 9: For My Next Trick...
What I decided to do was make new, single, free-range styluses and set them loose in the same manner. I'll post a pic of the results soon.