The cross section of main form is is about 1.5 mm thick. I am wondering about the overhang as this are begins to form , top pic, after that I think it may have enough attachment to the main body to be self supporting, bottom pic next few layers.
it looks like it’s angled a bit so it will build up as it moves up
One thing I’ve found–if you are printing something vertically and you’ve got some parallel surfaces it helps if you angle them slightly so that it builds up, you probably won’t notice the slight angle and it makes the print come out much better.