Source expander dual threshold expander (PSE) AS AN ADD ON

it would be great if we could have a scource expander on the sq even a dual threshold expander, id even pay for it as an add on !

This has been requested several times with a lot of positives votes. (for many years) I think it will not happen though. The A&H tech team has other priorities.
Or maybe it is technical not possible within the SQ-series, but my question asked about this, was not answered by A&H team.
Dyn8 Engine was also requested, but for this A&H answered that it is not possible with the used SQ processor in the mixer. (and this is a fair and clean answer)

Let’s hope the A&H tech team can find some time for this in the future,..