At the NWTF Convention last week I saw Silencer Central's new 20-gauge suppressor that can be used with TSS. But with notable limitations, like OK for #8 and larger, but not #9. And TSS cannot be shot with their Full choke.
I thought hard about it, but passed. In part because I just stocked up on a bunch of TSS #9. Maybe somebody here will take one for the team, do some tests and report out?
If Silencer Central was smart (I know they're reading this), they'd publish TSS #8 patters through their modified choke at 20-30-40 yards. That would go a long way towards selling it to this crowd, assuming the patters are acceptable. Just a suggestion SC...
https://www.silencercentral.com/products/banish-20