Jonathan Dietch writes:

I have a limited number of these extremely high quality precision
drogue chutes made by Free Flight Enterprises available to pilots who I believe
will use them safely and effectively. These are not toys but are a highly
effective form of glide path control that may expand your flying horizons or
save your bacon. If used carelessly will contribute to an accident.

Read my article:
https://issuu.com/us_hang_gliding_paragliding/docs/hgpg1704_issuu/54.

Some videos of this model and some similar prototypes:
https://www.youtube.com/playlist?list=PLTHxo-A4KNC9LY-Ecd8kPQW7A6WsgC4J9