Has anyone (Pentaxians) tried out the Ebay Bellows. What are the pros and cons, image wise?
I realise that everything will be manual, I has access to older Pentax lenses with aperture ring.

The thing is that it comes with a two way macro rail, all $100. Even if the bellows are below par, I can still use the macro rail.

look up Ebay: 'Macro Foucus Slide Rail Macro Lens Fold Bellows For Pentax K-x K-m K-7 K20D K100'

opinions before I purchase.