Medeco not so secure after all

Medeco locks are immune to bumping, right?

Well ... actually, now that you mention it, not so much.  Marc Tobias reports on a successful compromise of a Medeco M3 lock mechanism using a dummy key blank and a paper clip.

To make matters worse, we were able to create a bump key with our simulated blank, that would open an m3, (although bumping is, in fact, much more difficult in this scenario).  This capability may raise serious security concerns, especially in commercial and government installations where master keying may not be allowed.

Medeco lock bumping video here.

Safecracking challenge

Tangentially related to the previous post ...

About seven years ago now, we were given a safe.  Manufactured by the York Safe Company, it is (very) approximately a thirty-inch cube, weighs a couple of hundred pounds, and bears two markings besides the manufacturer's name: a serial number, 15246, on a metal plate affixed to the right side of the safe, and a sticker which may be a model number, R-2741, on a hinge just above the serial number plate.  (The sticker may not be original, and may not necessarily convey anything useful at all regarding the safe.  It could be an asset tag, for instance.)

The catch:  The combination to the safe is unknown.  The safe was given to us by a second party, which whom it was left by a third party, who moved to Alaska and left no forwarding address or contact information.  The condition was, "If you manage to get it open, and there's any identifiable documents or instruments in there that can be traced back to their owner, do your best to return them.  Anything else is yours."

Frankly, mostly, we're interested in having the safe usable.  Anything valuable that should turn out to be inside is gravy.  But first, we need to get it open — and do so non-destructively.  We've talked to locksmiths; drilling it probably isn't an option, since it may have asbestos insulation, and they want $60 per hour to crack it with a dialling robot, with a three-hour minimum and a probable cost of at least $300 to get it open.  For $300, we could buy a new, fire-rated safe.

But, we know many geeks!  So ... any of you ever built a safecracking robot?  Know anyone who's built one or has one?  Could we borrow it, for a share in any resulting loot?  Any other ideas?  We've tried opening it by manipulation, without success, and tried all reasonably probable combinations we can think of derived from that R-2741 sticker just on hthe off chance.  There's enough roughness and play in the mechanism that manipulation does not seem feasible.

So here's our challenge.  If you can successfully help us get the safe open, resulting in a usable safe, we'll give you a fair share in whatever (if anything) it may turn out to contain.  (Over and above providing food, beverages and entertainment for the attempt.)

Anyone up for it?

Update:

I've actually just gone and measured the safe instead of relying on memory of its size.  My "very approximate" 30-inch cube estimate was rather more approximate than I realized.  Actual dimensions of the safe are approximately 27" high by 21" wide by 20" deep, not counting protruding parts.