Possibility to adjust 6581 filter depth in a later firmware?

[modeler]

I was sure someone must have asked about this before, so I had a good look through the issues and discussions but can't find anything...

SKP (particularly the 2040DAC model) has become my go-to SID replacement, and possibly my favourite build-it-yourself piece of retro hardware of all time. The default filter character in 6581 mode is a really good balance, however it would be great if there was a may to make it just a little bit deeper.

ARMSID can do this via a separate configuration utility. VICE also has filter controls but this was only added recently, like a couple of releases ago. I am wondering if this is a feature of more recent versions of reSID that would not be available in the version used for SKP?

It would be amazing if SKP had something similar in its SYS 54333 menu, or failing that an option in SKpicopatch to configure it at the firmware level. I would love to have this option, but SKP is still awesome as it is.