I am not very experienced with compound miters but I think that is what I need to use in this application. I want to build a serving tray but thought it would be nicer with beveled outside boards. So, if I choose a 15 degree bevel on the table saw to rip the outside "rails" to width, do I then compound the miter saw to 15 degrees and 45 on the miter? I tried this with some scraps but it didn't look like it worked. What do I actually do?