The Platinum does have a top vent in the center.
I really do not think it will matter much, if any. The top vent location is just a few inches from the top vent location on an OTG or OTS.
Just do the typical indirect setup many of us use on our OTG/OTS style Webers, and I think you will get the same results. Try it out with some cheap meat first, of course.
CD
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