Since people wanted to see how it turned out. This is a 330x330 object that covers the entire purported print area of my machine.
I'm ashamed to admit that I undershot my filament usage calculation slightly, and I chickened out just before the finish line. I didn't have any more white in stock, so I switched to some grey of the same type from the same manufacturer by doing a mid-air refuel, shoving the end of the new spool in chasing behind the very tail of the old one. I don't think it looks too bad. I may just spraypaint the entire thing white later anyhow. I wanted to use a light color in order to more easily spot and keep track of screws and springs and such.
I think the grey edge looks better than 100% white. Things like this are the reason I have AMS, all my prints are functional and could be done in one color, they just look better when they're not. And if it's for screws and hardware, they're going to be down in the white where they'll contrast, not hiding up on the edge.
Yeah, the grey looks great. Just the right ammount, imo.