Bed platform cut guide help

Hey all. I have been gone a while from this site but super happy to see it still so active.

I’m looking for help finding an image I had saved on a computer that had a hard drive failure and I couldn’t recover the file.

It was from one of the many forums on platforms, obviously. From memory I recall it was red marks made in PS or similar over a pic of the plywood and had the measurements for how far in and possibly the angle needed at the end of the bed. Wish I could be more helpful, and I’ve looked at lots of ideas this morning so I’m thankful for everyone’s content.

I’m going to take a square outside and see if I can measure some stuff up but if anyone has even the slightest idea of what image I’m talking about (or a similar one to make it easy on me) I’d be stoked.