I want to apologize to Debbie, and the list members at large, as my reply was made in haste and is obviously confrontational, read in retrospect. I have purchased 2 WO accessories (neither was an optical tube). One, bought several years ago, was impeccable, the other, purchased more recently, had obvious manufacturing flaws. I returned it to the seller for a full refund, was not interested in an exchange. I have also heard from others of a slip in WO quality recently, one is a U-A list member who can post or remain silent as they see fit. Every manufacturer has items that slip past QA on occassion, but when it happens to a manufacturer of high repute, it leaves a very bad taste in the mouth, sometimes for a long time. One man's meat is another man's poison, as they say. YMMV.