I have, as a start, put out 10 signal converters on ebay to see the response.
The response has so far been very good. Also a Acorn Facebook user group has show interest.
I am waiting for new master PCB that will arrive any day now and will be shipped as soon I get them soldered.
This include a new resistor network package as the original I has cost 15 times more. This is version 1.2
The external and “under the BBC” version are now upgraded to include the signal A3 to P29 on the Pi.
This will be for all version 1.3 and newer. The internal master version does not have this signal.