Hi I am working on a project where I am mounting a speaker in an acrylic sphere. To do this I am got an acrylic sphere with a pre cut hole online, then cut tabs into the edges of the hole using a dremel, then attempted to carefully bend the tabs flat using a heat gun and pliers.
The result was messy, the sphere quickly started deforming in other parts, and the piece ended up ruined.
Given that this is a sphere and I can't just back the piece with wood as is recommended in online tutorials, how can I bend down the tabs without deforming the main structure?
Here is a picture of what I'm trying to accomplish (similar speaker mounting method with bent tabs in a metal sphere):
Here is a picture of the deformation I got on my first attempt with acrylic: