Thanks guys!!
It is a lammed together phenolic riser with 1/4" walnut caps on sides.
A 250 CX heritage 31" long with 250 up front is working nicely.
I haven't done enough testing to see if the tapered glass helped or hurt. my feeling right now is it didn't make any difference , unless it is quieter. David Flanrey is here hunting on the lease and shot it today, he thinks it is pretty quiet.
Actually took her hunting tonite, but was in the right place at the wrong time I guess, saw zip!!
17* with a 20 mph wind when I went and 14* when I came out. BRRRRR