Chuck, like Bill's other ideas, he didn't try to patent the BKD but just shared with others who could use it. Like you, my friend. I'm trying to remember your weightless mount but I can't picture it. I couldn't store all of my back issues of S&T so I can't look it up. The big advantage of Bill's idea over simply moving the bearings on a Dob was that you could indeed adjust it on the spot if it was windy or if other conditions changed and you wanted more or less friction. For awhile an acquaintance of Bill's from Arizona (I think) even manufactured and sold the BKD commercially. Kim -----Original Message----- From: utah-astronomy-bounces@mailman.xmission.com [mailto:utah-astronomy-bounces@mailman.xmission.com] On Behalf Of Chuck Hards Sent: Thursday, February 17, 2011 1:49 PM To: Utah Astronomy Subject: Re: [Utah-astronomy] Bill Kelley Kim, the BKD preceeded my weightless mount and they are not related. My Weightless mount was featured in Sky and Telescope about eleven years ago and is for refractors and Cassegrains, not Newts. Bill saw it in S&T and called me. I like Bill's original BKD in that it was adjustable. Having one-finger pushability is good on large scopes if there is no wind blowing at all, but otherwise you need a little more friction.