~The below instructions assume you wish to make several cut-aways and get the perfect.~
First get hold of some broken locks from a locksmith, or buy the very cheapest ones you can find. You'll find companies tend to make really cheap, but inferior copies of other locks, for example: Bluespot.
Now get a fair few of them and decide whether you want to use a dremel or hand tools. Both work great, but padlocks are very difficult without a Dremel. My advice: Get good with the Dremel, it'll be very versatile. Now hand tools are more likely to produce a good finish on your first attempt since hacksaws and files are far easier to control than a whirling Dremel. USe whichever, although I suggest you get used to using either.
You first cut-away will suck, deal with it. My first cut-away was a disaster, and I was really dissapointed I had wasted a too nice Yale lock in the process. The next one I tried was a cheapo Mila lock, and I found this time I ruined the lock, but at least the cuts were far more accurate, and I knew the best way to go about it. The third attempt was another Mila lock and I nailed it, not only were the cuts aligned fairly well, the lock still worked when reassembled. The one after was an Iseo euro cylinder, and I cut the plug accurately enough to expose the bottom pin action. It took me 4 attempts to make a good cut-away, the number will vary with the skill level aready present in each person however. I had never used a Dremel before I tried to make my cut-away.
A while after my first cut-away, I have used high security locks and exposed their internal mechanism. The process is the same, but requires you to plan out where the cuts will be, and how you will ensure that things like side-bars stay in place etc... Many people have ade cut-aways and search the forum to help you, the 'lock breakdown' thread contains many links to cut-away locks, yuse these as templetes for your own.
ACCEPT YOU WILL FAIL BEFORE YOU SUCCEED, LEARN FROM YOUR MISTAKES, and for the love of g*d, DON'T USE A LOCK YOU CARE ABOUT!
Oh yeah, and don't start with a padlock, they are bound to cause heartbrake.

Ben
