I just now read about your loss at C6. Very sorry to hear that. I can strongly relate to your pain. Such a shame that there are people out there like that who would steal things that were clearly not meant as 'giveaways.'
But, to be honest, I think these weren't the low down, dirty, corn licking, cork soaking, rat bastard thieves that you may think who would be the type to steal another man's belongings. I propose these were brilliant, albeit dishonest and of the lowliest of sorts, diabolical black marketeers. The people responsible for this crime probably have been planning this ever since the word spread the globe that you were making a public appearance, and with a possible chance you'd be bringing your tools.
Imagine their thoughts..... Like possessing Thor's mighty hammer, they now have the tools of a customizing god. These are the tools used by the legend, and have forged countless masterpieces.
On the black market, I estimate some of the items, once known to whom they belonged, with fetch enough money to purchase 6 blocks of property in downtown Tokyo. Your status as customizing god was established many moons ago, and with that responsibilty goes great power, and the need for a top notch security team to keep the crazies away.
Seriously sorry about your loss. If you get names, I'm always down for a late night visit and my 'sucka shanking' kit.... It's a kit that holds things for the sole purpose of shanking suckas.