Hi! :-)

> I have ST class kartand am wondering if the seat for the tornado
would fit and were I might find one? They look the same except the
seat looks better on the tornado.

They aren't compatible. The ST seat has the mount you already know
that is secured by the screw that secures the rear fork on the frame,
the new seat has a new mount that screws on the frame. The rear mounts
are different too. When I have the time I'll take some photos of both
and send the link of the photo set to the list.

> Also any one know how to mount a light on the trike or could I get a
different boom to mount one?

I think there will be an accessories mount for the boom in the future,
but I don't know if it is backwards compatible...

Cheers,
Bruno