The T-beam SoftRF board is a very cost-effective replacement for failed Flarm devices. It does not have an audio output to alert pilots that a new target is close. I have added speech synthesis to the Cotswold Club vario to produce a low-cost Kobo/LK8000 navigation system for our club gliders. See https://www.postfrontal.com/forum/topic.asp?TOPIC_ID=8961 The system correctly announces airspace alerts but it would be helpful if Flarm targets could be announced to increase safety. The Cotswold Club Vario is an open-source project and can be built for 20-30 euros. It is currently configured to output data to LK8000 in Bluefly format. I can supply a board to developers if it is decided to implement the alarms. I have over 6000 gliding hours.