Apache 2800 5x7 speaker adapter

I want to make DIY turtlebox.  I used an Apache 2800 case from Harbor Freight and 1002T amp along with a Kobalt 24v battery adapter.  I could not find an adapter for a 5x7 so I made one to allow me to not have to trim the ribbing on the case and to have a template to do the cuts.

Recommend using PETG or tougher and silicon if you want to seal it or print out of TPU.