Printed using white PLA. I should have used a raft, as one edge of the lid did not adhere well to the bed and distorted the print. Also, the entire print ended up being too small to fit the GoodFET 42 board inside. My print ended up being 19mm wide x 47.3mm long, but my GoodFET is x 20mm x 48mm. I haven't checked to see if this is a design or printer issue, but you might want to increase the size of the print slightly to get the GoodFET to fit.
I did notice that the LED hole and the hole for the headers appears perfectly sized/aligned, which is nice. I haven't decided if I will retry the print as is (but with a raft), scale the print up slightly, or just give up and cut a box out of acrylic on the laser cutter.
(Sorry for the crappy photos, only have my webcam handy at the moment.)
Printed with no raft onto blue painter's tape-covered bed.