Alright CA i am printing your Iris Box right now. I am using the speeds that came with the marlin 2.0 firmware and the settings that came with the Prusa slicer. I have not made any changes to any of the speed settings yet. I am open to suggestions or screenshots of better settings i might try. Or i will find an answer from youtube or google. This iris box for me is set for 3hrs and 2 mins. But it is looking good so far..