Precisely Cut Opening for Panel

What happens here

With the internal frame in place, prepare to cut the opening in the composite deck siding. Attach a track guide (such as the Makita guide rail) securely to the face of the deck siding using screws. This guide will ensure a perfectly straight and clean cut. Use a track saw (or a circular saw guided by the track) to make the precise vertical and horizontal cuts through the deck siding, effectively creating the removable panel section. Pay close attention to cut depth to avoid damaging internal structures unnecessarily.

Goal: Create a clean and accurately sized opening in the deck siding that matches the installed frame.