Project topbox, too much like a pizza delivery boy?

[Kerry]

While I'm "overcorrecting" I may as well go overboard....  HERE are a couple of posts showing an even bigger Givi topbox - 52 liters!   (See also this post.)

As for mounting those big bags, here are some more photos from Cal Price:





How'm I doing? 

[Kasumi]

Thats it, the 52l we have with the option backrest - i checked it out on the bike earlier. Fantastic topbox

[NightRyder]

Slayer eh RVertigo?

Sorry everyone, finals are upon me, and this is taking a back seat (ha pun!) untill I'm done.

[ukchickenlover]

You could try one of these.
http://www.tamperseal.com/product_info.php?product=PacSafe_140_Secure_Bag_Protector&cPath=29&products_id=124&osCsid=8e8b47aedc98149271aba86fdc07e9f0
I have never used one myself but when not in use it would not take up much space.