I got the 3 bagger H-D one on my RKC. Love it. See pic below.

 

got the 3 bag from HD. it has marred the windshield from vibration but not a problem - like mentioned before - unless you remove them.

i chose the 3 bag cause i wanted to separate things, again as mentioned earlier.

i find if i put my IPASS (tollway thing) in it, it will register.

 

I have the T-Bags 3 pouch. Very roomy and well made.
Here is a pic.

 

French-
I wonder if that style T-bags fit on an SG?

 

Yes it does. I use a SG windshield on my Ultra in summer and the T-Bags don't extend above it.