You can ignore the legs, it’s about where the beams meet each other and the top layer.
You won’t find the exact spot cause I uploaded a different platform. I knew there was something else wrong with that platform (from the original screenshot) anyway, so I didn’t want to confuse you and I copied another platform that does the same messy stuff into a new skp (to reduce file size).
Interestingly, when I zoom in on this file, it doesn’t do it!
No, the platform needs to be tilted but also be easy to bolt to the legs. That’s way I end up with all sort of angles that I find tricky to align.
No thanks yet then