When I get through Ashish's full repository, I'll run Petr's version and if OK move it to Samples. It'll be good to have some in SUB_GL which are other than Ashish's. I may be a few days. Good things come to those who wait.
Edit: Tried Petr's modification. Although a very good demonstration of Open_GL, it somehow lacks the wow factor of Ashish's original. I'll use Ashishs's in Samples.