Just curious to know if any of you have used the lockable frame bars marketed through Howdy Optics. They are for sale on Ebay at a very reasonable rate (just a fraction of what others charge). Very hesitant to order any until I ask around to see what the quality of these frame bars are. They could very well be junk. Please if you have any knowledge of these frame bars could you drop me quick note to let me know what you know. Thanks a bunch.