The newest I could find were 3 year old threads.
My post was going differently, until I reread something and I am still confused.
For the purposes of feat prerequisites, a character with the panache class feature satisfies the prerequisites as if she were a grit user, and vice versa. Swashbuckler levels stack with gunslinger levels for the purpose of satisfying Signature Deed’s level requirement.
So because of the above a Swashbuckler is effectively a "grit" user and at 11th level qualifies as a Gunslinger for the Signature Deed feat. Is this correct?
When it says it stacks for the deed, does that mean you could take, say 5 levels of Gunslinger and the rest in Swashbuckler to qualify for the Feat?
Yes and yes.