On Thursday, July 28, 2016 at 5:36:38 PM UTC-4, waremark wrote:

We divide the downwind to base turn into two approximately 45 degrees turns, to insert a 'diagonal leg'. After passing low key, instead of continuing a long way downwind to make a rectangular circuit, we turn 45 degrees onto a diagonal, and later make another 45 degree turn onto a shorter base.

And then you make a 90 degree turn from base to final?