Nightstalker, that looks like the cheshire sold by Andrews. Thats a cheshire only, but the orion one is a combination cheshire and sight tube.
The difference is that the orion one is longer, enabling you to set it so that you can sight the secondary against the inside edge of the sight tube.
If you want to make a sight tube, get a length of 1.25" outer diameter tubing thats [f-ratio of your scope] x [inner diameter of the 1.25' tube] long, with a peephole in the centre of one end.
See
this page for the general idea