Hey guys...does anyone have the Swagman Deluxe Rac Adapter? I'm looking for something sturdy (and safe!) so that I can rack the wife's mountain bike to the bike rack. Her bike is old and close to 35 lbs. I need an adapter to add a horizontal crossbar. The one I have that came with the rack is very plasticky and I'm not confident that it'll hold. I'd like something pretty strong that won't break off or come loose on the highway and over bumps. I noticed that Yakima and Saris both make one as well but they don't seem to clasp too securely. Anyone have any experiences or preferred product?

This is what I've seen so far:
http://rackoutfitters.com/store/Scripts/prodView.asp?idproduct=306
http://rackoutfitters.com/store/Scripts/prodView.asp?idproduct=370
http://www.swagman.net/detaila.php?id=64004
http://www.swagman.net/detaila.php?id=64005

Any help is appreciated. Thanks alot!

Charles