Please forgive me Al but I'm not exactly sure what your question is. However, to cut material that thick, depending on how good the cut had to be, I'd use either my 12" SCMS or my 10" BigFoot wormdrive saw.
It sounds like this might have been one time that your growing experience level would indicate a need to purchase a new tool. (As if one needed a good reason ) For a cut as you describe, a good SCMS would be the tool of choice IMBO (In My Bonehead Opinion).
My diet is working good. I'm down to needing just one chair now.
"Just think how stupid the average person is, and then realize that half of them are even stupider!" --George Carlin