just today recieved mine and installed it on my scope. lines it up with a distant object and tightend everything up. lookin forward to tonight. dont think ill need to change it from the crosshairs though. got mine from skies unlimited on ebay uk. id recomend this type of base if you dont mind drilling a hole in you tube for the screw.
http://www.ebay.com.au/itm/Telescope...item5893b5daa2