It beats me why they make these complicated gadgets for such a simple job. I use engineering jaws in my chuck and put the drill in the jaws with only25 to 30 mm protruding. I then put the blank between the drill bit and the tail stock and feed it in with the tailstock. Release the tails tock and bring the drill bit out further and repeat, when nearly through put a bit of scrap between the blank and the tailstock centre, to save ruining the drill bit, and go all the way through.
I do this with a 3mm long series bit for light pulls and they run true every time
Ron