Yup they take different parts all the way around. I have some I've tired to get rid of to no avail here, too. Nobody seems to want them. They are fairly light weight. Definitely not clones. They do have a side tension... That's about all that is in common. Word to the wise - do some research on QB - we have tons of info - there is a search box at the top of the page. 400 threads will come up - scroll through and learn.