That's a TT carb from 2001 or later. The engine itself just doesn't make it as any kind of OS.

The Thunder Tigers are very rare in the area where I live. I only see them when I visit some ways away from home.

I was around south central Georgia some, a few years ago, and all you would see would be Thunder Tigers because Hodges Hobbies supported them.

The hobby shops around here are typically Horizon Hobby oriented.