Anyone tried this out?

I wasn't even aware you could do this until I bought my own DL4 a couple weeks ago and read through the manual. I've looked for video demos or posts, articles... anything explaining how exactly it works.

Can you sweep in between two entirley different delays? Or is it just the delay time?

Any info would be awesome before I run off and just buy one to expirament with.
And maybe we can fly away from here, surf on the debris of a broken scene...