Unfortunately I could not find a suitable guide for my miter slot and Fence. Most metal guides of this size/dimension are Metric and my fence uses 1/4-20 bolts.

Included is the .gcode for Creality, though may work for other printers?

Sadly not all slots are compatible.

CR10S Pro

Yes

Yes

Naturally you can use whatever settings you want. I only used 20% fill, though if this will be under significant stress higher fill would be advisable.