Prints being scaled up by Mars 2

[elegoop]

Hello, I've recently purchased the mars 2. Coming from my old printers the quality on this thing is stunning. And the speed. But for some reason my prints are being scaled up. When using chitubox, the measure approx 69mm (just under 2-3/4"). This is the correct diameter, and matches what I have printed before on other printers. But when I start printing, the part comes out over 3" diameter (about 78mm). The files are the same I've used in the past. In chitubox and in Cura they show the same dimensions. But when I print, they're much bigger. I can probably work out specifically how much bigger they are and scale my print down accordingly, but it sure would be easier if I could just enter the dimensions and have the part come out reasonably close. 

Anyone have a similar issue? Any ideas?