How to Make a Balisong (Butterfly Knife)

People, I first want to tell you that due to the fact that these weapons contain very few design flaws, the International police have made it illegal in almost every country; Including Australia, the U.K. and America. So I'm putting this on in case you find that you may require one (to get back at buggers, keep bullies at bay etc.). but nonetheless: Ladies and Gentlemen! Boys and Girls! I present to you the Epitome in weapons; the Butterfly knife!

P.S. First, don't whine to me if somebody gets hurt or killed with my product. you killed 'em so it's your fault.
second, no whining to me to remove them, they're legal in lots of countries and if you're not happy with that; go and join your emo convent. its ok if you just tell me that its illegal in your country ( IF YOUR NICE ILL GIVE YOU SOME TIPS ON HOW TO KEEP IT^.).

P.P.S. any suggestions are fully welcome and encouraged. I would love to see the community get creative (even if it is by exploiting one of the most dangerous weapons ever).

Step 1: Making the Handle, Basic Outline

To make the handle is to doe the hardest bit. Since this weapon is custom, measure your hands and cut two half-handles appropriate to said size plus 5 mm or a bit more.

Step 2: Handle, Rounding and Blade Holding Drill

next step is to sand the top edge so that they will rotate in the main shaft easily (without colliding). Don't do too much or it can screw the design a bit.

Since that last step was short I'm putting the next one in here as well; in sanding the top you should have created a semicircle (more or less). Halfway through the semicircle drill a 5.5 mm hole.

Step 3: Blade Rotation Rut

Next we will create a 1-2 mm rut a the top of the shaft to allow the blade to rotate. let it be around 2 to 2.5 cm. cut it straight in the middle on the opposite sides to the holes you drilled earlier.

Step 4: The Blade

now to make a blade! at long last! I made my blade tan-to style (a tanto is a ninja knife) but feel free to improvise! make lapu lapu swords, combat knives, goreswords and even small keys! so first part is to make the rotation piece. make sure this fits with your handles so that they can go 180 degrees. then you can make the blade. it must be smaller than the handles of course.

Step 5: Containment Rut

this is the unique thing that inspired the "switchblade" style knife. the containment rut is in both handles and is used to hold the handle.

Make the rut halfway through the handle to be safe or more if nessescary, both the handles must conceal the blade completely.