Hi Carbymaster, first one I made didn't work, second one seems to work ok I will make another one a bit longer in the needle slot so that I can get enough length to offset the slotted sections to sit at 90 degrees to the needle and level with the top of the formed ring in it, this seems to be where it works the best and it is very positive in its action. Bit fiddly on installation but if this solves the problem then that is all we can ask for. I now need to find some grass to cut to see if it is going to function in a working situation