Having purchased the 'entry level' Festool sander a few years back, I have struggled to adapt some fixture to the dust collection port. Lately at the advice of a store employee, I searched plumbing fixtures and found that a sink drain extension fit over the dust port, but loosely. With an old inner tube as an adapter (inside the tube), it fit and stays. The larger end fits into my dust collection hose that has a rubber (flexible) termination. This does not lock onto the hose the way a real Festool hose would, but it only cost a few bucks and it works (after cutting away the unnecessary portions). As long I ensure that I don't tug hard on the hose during use, it works for me.