AM8 - Y Rod Holders For 360mm Long Extrusion

These are a remix of pheneeny's Y rod holders. If you decide to opt for longer extrusions along the Y axis you will may need a different rod mount design. I am using 360mm long extrusion which leaves only 10mm clamped in the current holders. I split the holder and moved the clamp bolt over 5mm to center it over the portion of the rod that is clamped. the other half of the holder is solid and serves as a positive location of the rods. I could have left the clamp feature out but thought the holes