Trust me, the best I had from a tungsten set was 50 acres, tiles kept breaking off, the standard ones did about 25 acres a set in the autumn, I am comparing like for like drill costs, the new drill will owe me a fair sum. The cost of running the mzuri was nothing to do with the depreciation, it was metal and time that crippled it, Martin Lole designed a beautiful drill but the wearing metal was crap. Ask people why they keep selling them. We farm on chalk with a lot of Flint, but if your farm is less abrasive you might get better output. Personally I think the claydon is the best option if you want strip till. But looking back I don't see the need to move so much soil to plant grain crops. In theory it's perfect... But as with everything, it's notI cant believe that the leading tine can only last that long unless on abrasive sand and would your metal last any longer if on that soil? Contractors are charging around 22/23 for using a strip till but for a two pass system they would want £17 for just the drilling, comparing the cost of a new drill on different soils to a older or homemade one on easier/kinder soil is like comparing apples and pears. We all do it to justify what we do it. I am no better