What are these 45 degree things you speak of?
No, I know what they look like. But our local gym only has the "old school" device featured in that video, luckily.
I do back extensions, not hypers, which look a bit different in execution, but probably offer much the same end results, I imagine. Are you familiar with the back ex, as opposed to hyperex? And if so, what are your thoughts on that in particular?