atempted rework for y axis belt holder with tensioner

re did the idler file to make it stronger and to move the hole so that the bearing misses my aluminium extrusion frame and to have a thicker hinge area, the two files named idler are the originals and the mount with one of the two other files is needed to print the thing, needed is a few nuts, bolts and washers plus one Ball Bearing 608ZZ Bearing 608Z Deep Groove Ball Bearing 8mm*22mm*7mm from ebay.