I had a written a similar (albeit less abrupt) response earlier but thanks to the incessant "site is too busy" message it got lost.
To sum up my previous response: don't do it. The DL4 has more than a few flaws and quality control issues. Plus, as a looper it's only barely more usable than the DD-20. Why don't you invest in a looping-specific pedal like an RC-2. Or my favourite: a JamMan. A proper, dedicated looping pedal is so much more than a sample-and-hold type deal. You really have to try one to appreciate it. They make making and using loops a pleasure, not a hassle. Hold on to the DMM and get yourself a proper looping tool and you'll be much happier than compromising on a so-so delay, barely usable looper that is the DL4.