Step 1: What You Need
2. Hack saw blade
3. Gorilla Glue Super Glue ( Or any other kind of really strong glue)
4. Mini saw ( pictured below) ( you could use a knife but a saw is a lot easier)
5. Measuring tape (not necessary, but it helps)
Step 2: The Groove
Step 3: Time To Glue
Put the glue in the glue in the groove all the way down it's length. Now place the blade into the groove and hold it until the glue sets enough to hold the blade ( 30 seconds for the Gorilla Glue that I used).
Step 4: Finished
No have fun, be careful and don't hurt anybody or yourself ( I am not responsible if you do).