Andreas Bauernfeind from the TU Vienna Spaceteam has designed and constructed a
similar device taking the fundamental concept of the device and improved certain
aspects of it by simplifying the complexity and reducing the construction workload.
So far the team have flown this device twice (that I’m aware of) with a successful
recovery both times.
The TU Vienna Spaceteam device is currently designed to be filled directly from
the mini CO2 cylinder.