Hi guys,

I need to create a flat pattern for the below. The geometry is rolled at a constant radius (see top view in pic 3). The curved cut-outs are based on a revolve cut.  

What I have tried:

1. Create sheet-metal base flange then revolve cut. I get the correct geometry I want but it won't flatten because it's not a normal cut.
2. Create boss/extrude thin feature first then revolve cut then converting to sheet-metal