The Max 10/45 upper that is currently advertised by Lage is described as having a 750 rpm rate of fire. Digging around in old threads, it appears they used to offer different options. I believe one was around 600 rpm and one was around 800 rpm. Does anyone know why the different options were discontinued? Is it still possible to slow the new Max 10/45 down to 600 rpm? Is there any advantage in doing so?