So you want to get the Critical Magnetic Trigger Kit but don't want to spend $16 on two small pieces of magnets plus a packet of glue? I don't blame you!
Start off by buying a 3/16" dia. x 3/16" thick magnet.

This magnet is for the pocket inside the grip frame where the trigger spring is placed.
Then buy a 3/16" dia. x 1/16" thick magnet.

This magnet is for the trigger.
The last thing you need is some super glue. I used Instant Krazy glue. Be sure the purchase the ones that are liquid, not gel as gel would be too thick for such a small job.
You can purchase all of these at your local hardware store, i.e. Lowe's, Home Depot, Ace Hardware, neighborhood mom & pop, etc. They should have them. If not you can do what I did and purchase them online.
Here's the two magnets I purchased:
http://www.kjmagnetics.com/proddetail.asp?prod=D33
http://www.kjmagnetics.com/proddetail.asp?prod=D31
These are standard N42 grade magnets.
However, if you want to experiment you can purchase the N52 grade which has a stronger polarity.
http://www.kjmagnetics.com/proddetail.asp?prod=D33-N52
http://www.kjmagnetics.com/proddetail.asp?prod=D31-N52
Mix and match to find out which pair of magnets fits you best.
Now that we got materials out of the way, let's talk about installation. If you don't know how to remove the trigger from the grip frame, please refer to the manual and/or stickies.
Start off by getting the both magnets and finding their reverse polarity. What this means is to set them so that they repel each other.
After that has been found, put the 3/16" dia. x 3/16" thick magnet into the spring pocket inside the frame. You don't put any glue for this magnet.
Then get the 3/16" dia. x 1/16" thick magnet, don't forget about reverse polarity, and glue it to the trigger. There's a particular way you have to glue this magnet. Place a small amount of glue below the spring tension hole and place the magnet so it halfway covers up the hole. On a side note, if you've ever opened up your grip frame and pulled the trigger back you'll notice that the pocket and spring tension hole don't line up. That is why this method is required as once the trigger is pulled back, it lines up correctly and is directly in front of the pocket magnet, giving optimum magnetic resistance.
Let it set for at least 5 minutes.
Reinstall the trigger.
Done.
Should you want to ever remove these magnets, simply pry them out with your fingers or pick and clean out the glue residue with nail polish remover.
So let's recap.
Critical Magnet Kit: $16
-
Frame magnet: $0.25
Trigger magnet: $0.19
Glue: $1.00
=
Savings of: $14.56
Sorry there are no actual tutorial pictures, I recently sold my DM9. However, there is also a video tutorial on Youtube which I cannot post without it getting removed but PM me and I will link it to you.