I need to make some wide crown molding but since I haven't done this before I would like to know how you cut your own. I'm sure I could figure it out through trial and error, which I'm sure will happen anyway, but thought I'd see if I can get some tips first.

I need to cover a wide gap between the top of a cabinet and the ceiling--it's about 4" wide. I'm also considering putting a cove on the molding so I also need help using a trapezoid to figure out the feed angle (or any other suggestions for feeding stock through the table saw blade at an angle).

I've been working wood as a hobbyist for 20 years so I know what I'm doing in most woodworking aspects. I'm getting a little hung up on the geometry though. Thanks for the help and if you have any questions or need more information from me just fire away!

Brian