I dont think the new one (MKII) has the roller. If the one you saw had a roller, it probably was an MKI. No big deal..

Here is a picture of the Marstrøm MKI: http://www.tornado.org/html/images/marstube.jpg

The tornados are using several types of snuffers, with the Graham Eeles tubes probably being the most popular ones. Regular rings with bags are rare now, but we are quite satisfied with our alu ring. I would like to do a ring similar to what Phill has on the Blade prototype, as you dont have to pull the spi over the bowsprit tube on his variant.

Marstrøm stuff is always high $$$, building high quality items in Sweden is not cheap.