Sign ups are still open (Four for the KritzKast Low-Fi Offclass Cup until Saturday 12:00AM EST. Interested in something a little different? Players are limited to no more than two of each: Pyro, Sniper, or Spy and only one Heavy, Engineer, or Medic. There's a few unlocks white listed as well, more details can be found in their announcement. Specific sign up details are available here.