Bullseye Worth buying bullseye for grilling only?

[Gilmore]

Question on grates. I had a RecTeq rep advise me today not to use cast iron grates in the Bullseye, because they get so much hotter than stainless, all your temps will be off. I prefer cast iron because I know how to cook on them and I love the grill marks. Anyone have any insight/experience on this?

I agree. I check the temp of my cast iron grate before grilling and find it to be about 20 degrees hotter than set point.