No, I'm pretty sure I got one with my SG4. I found it in my garage just the other day. Do you believe I actually never knew what it was for until now!
I don't get why they never provide a proper user manual with tents...
Did you find it easy to set up? I still find it a bit fiddly to set it up so the fly is completely symmetrical. If it's not, the fly will touch the inner tent around the windows. I still didn't get leaks or condensations when it did actually, but I cannot bear seeing the tent like that and I worry about it all night if I notice it.
It is a really nice shape on the inside though. Very roomy and cosy.