I just got my elevator back from Highwing LLC today. I had it exteneded to the Mark 4 dimensions which is almost 4" more chord as well as installing a Ray Allen trim system. Can't wait to test fly it. Hoping to complete the bulk of the install this weekend. Will report back with a PIREP.   Lowell Fitt did all the work. He powerdercoated the metal after the extension and did all the work you see in the pic. He also covered and painted the final product. I am VERY impressed with his craftmanship.