Anet A8 X axis belt tensioner

Remix of previous belt tensioner (scrhall) to allow use of a toothed metal gear


also needed:
3 x M3 x 25mm bolts and nuts, (washers or double nut to prevent loosening over time if you wish)
2 x M4 x 35mm bolts and nuts

1 x gt2 toothed pulley, 3mm hole:
http://www.ebay.co.uk/itm/3D-Printer-GT2-Idler-Pulley-Toothed-and-Smooth-3mm-Bore-for-6mm-wide-belt-/191972288792?var=&hash=item2cb270a918:m:md9FbOxwy_8duyeHBjmbK6A