I'm trying to cope

I've brought the green beast, my Hitachi 12" sliding compound mitre saw,  into the house to help facilitate a hastening to the end of this dining room project.  

Last night I attempted my first cope cut in 9 years. (That's the professional way carpenter's cut crown molding corners so they fit together like puzzle pieces) And with this crown moulding I won't be doing it again. The top of the curve is almost level with the ceiling which means for the corner this piece to fit perfectly against another piece of crown, I had to back cut the this piece until the top of the curve was paper thin. And it still isn't completely snug. The rest of the room will be miter cuts.

Coped Corner

Mitered Corner