Universal speaker mount

****UPDATE******
I have added a version 2. This new update can mount a 6.5" speaker on the back. So you can have one file that fits a 5.25 or a 6.5 speaker. I also tried to make it look less bulky.

I made this for my VW Baja to mount some 5" speakers under the dash.
you need

To connect the top and bottom mounts together
1x M4x10x6 heated insert
1x M4x35 screw

to connect the bottom mount to the speaker cone:
1x M5x7x10 heated insert
1 M5x25 screw (I made the hole from the bottom mount tight on purpose so you have to screw it in the hole.)

I printed the speaker cone on its bottom ( speaker mount holes facing up)
-4 top layers, 4 bottom layers, and 4 walls
-5% cubic infill.
tree supports only touching the build plate