Heart Ring with rounded edges for comfort

Heart Ring with rounded edges for comfort, perfect for Valentines Day .
Printed upside down so supports aren't needed, HOWEVER...
Suggest printing with supports at 0.10 mm.
At 0.20 mm my Makerbot didn't include any supports even though I
had them on, and the round edge next to the raft didn't form as nicely
as I would have liked it to. Supports at 0.10mm improved that, but the overall print at .1 mm looked like crap on my 5th G MB device with PLA. maybe you will be luckier...