This is a super long shot but back in 2017 I ripped someone settings from the MTD block with a filter behind it. They used this for ambient delays and swells. It worked killer on my Ax8. I have spent a long time combing through very old threads trying to find it with no luck. Any where here using a MTD (prob plex) that they feed into a filter block for either tone sculpting. If you are. Willing to share what you are doing?