Bookbinding Tutorial -Covers

So it has come to my attention that not everyone knows how get a perfect corner when gluing book-cloth around a piece of binders board. I know different teachers have different approaches to this but I was told this is the "art conservator's" method. But hey it does a bang up job and leaves nothing exposed.

The instance illustrated here is when you prepare your back and front cover separately for when you are making an exposed spine binding. But the corner tab technique can be applied to any hard cover book, with slight modifications, to address the spine.

Anyhow please forgive any spelling errors and general bad drawing. I think it gets the concept across and if you guys like it I can make more book binding tutorials.