First, here's what you'll need:

1. A plastic ziplock bag, a flathead screw driver, and of course spool pins.

2. Put the key in and turn it to the side, this is to prevent the bottom pins from falling out along with the top pins when you take them out. It should remain in this position until you are completely done.

3. Put the cylinder in a ziplock bag and remove the spring cover using the flathead. The use of the ziplock bag is to prevent you from losing springs or pins in case something flies out (it is not an original idea of mine).

4. If you are careful or sufficiently experienced this should be the result after removing the spring cover.

5. Turn the cylinder over to spill out the springs and top pins.

6. Replace the regular top pins with spools. In this case I am putting them in positions 2,3, and 4.

7. Put them back in along with the springs.

8. After the top pins and springs are in place, put the spring cover back on. It is a thin and malleable piece of metal and should snap back on with a little force.

9. The cylinder is now ready for practice or to be re-installed.
Where to buy spool pins? There are many places, but here's where I bought mine: http://clksupplies.com/shop/index.php?cPath=22_35_53
Good luck,
Lockedin