Review on 🤿 Hollis 500SE + DC7: Unparalleled Performance and Reliability in Scuba Diving Equipment by Reid Rickerson

Dc 7 seems to be a good regulator although it has some problems there was a quality control issue on the first run. They were missing an o-ring on the high pressure side of the regulator which allowed the second stage to flow freely and also the dc7 could not be converted from yoke to din. Hollis will also never make a conversion kit as the regulator part consists of the first stage which is 45% of the regulator which is the yoke part. So you can only buy a din to yoke adapter if you want to use both yoke and din to dc7.