Stealthy, your right its a good piece of kit, I knock back the mark 3 all last year, even though I had them on the sheves in the shop this season I sold all my old grey boxes and took the plunge never looked back once you get used to using your eyes on the led display and not your ears with the clicking on the old grey box it all falls into place, and Ive found no more missing the tubes by inches and having to poke about in the side of holes you have dug, it's bang on every time