I showed the pics last night to my bf because the cage looks great with her up on the perch and I was explaining why and his comment was 'that's not going to stop the pushing' and then I saw your comment quoted above and was sad. His advice, which I assume based on the photos you've shared, I think you already do, was to 'take her out more'. I asked about the air gap thing and he also doesn't think that will really matter. I'm sorry I don't have any better ideas. I wanted to share his thoughts since he's much more familiar with tics than I am.