[Argus25]

I would recommend using the correct acrylic glue. The companies that work with acrylic often leave the protective paper on the sheets, until after the gluing, that way any glue runs do not mark the surfaces. And it is possible, with practice, to get a near invisible join.

For tapping/threading and putting screws into it, I would recommend 4-40 or 6-32 UNC threads rather than fine metric. A good thread for 6mm to 8mm thick acrylic is 1/8" BSW which has a very similar thread pitch to 4-40 UNC.

Bending thick acrylic can be tricky without the right equipment.

With regards to brass inserts, the press fit ones can result in splitting of the acrylic over time. The screw in ones are better into a threaded hole, with a very small amount of adhesive. Though it is possible on the press fit ones and to have less of an interference fit and use a small amount of adhesive instead.