I've got a 700mm total length 25mm x 10 Ground Comtop with soft ends ready for machining which I think are C3 if not then Def C5 which I bought from Jenatec years ago. I've actually got 3 in total all different lengths, this is shortest, others are 950, 1100mm the longest one got a preloaded double nut. I Will sell them as a set for £300 + shipping.