Posted on 13 September 20088 January 2019 by EditorProper Potholing by Steve Warren Dennis and Patrick still persevering with their MRD (Multi-rung device) 1986. Dennis Round and Patrick Warren can teach the aven bolters a trick or two with their secret weapon, 1986. Pics by Steve Warren ShareClick to share on Facebook (Opens in new window)Click to share on Twitter (Opens in new window)Click to share on Tumblr (Opens in new window) Here's some related tales...