Still exhibits the issue at .7. I took it as far as .4 and it isn’t as powerful, but you can still fill it. I tried in Repetier and it almost seemed worse if that is possible.
I have new/different steppers and the same electronics for the iTopie build. I might try this all using those as a test. I’ve always just used the LCD and sd card for all of my 3d printing and have many hours of prints that worked out just fine.