Prime Rib on Gasser

[Reds Fan 5]

Have a prime boneless ribeye roast from Costco for Christmas dinner. Cooking at my parents' house. Cooker options are an older electric oven or a four burner CharBroil gasser on which I've never cooked. Weather forecast is rain with temps in the mid-30s. I'm leaning toward the gasser for more control, better, searing, and the leave the oven open for sides. The only thermometer I will have is a Thermopop so flying a bit blind on grill temps. Advice for the beef roast on a Char-Broil gasser? I've cooked several on a kettle.

[fracmeister]

Reverse sear for sure. I am doing a big one (18 lbs) and will trim the bones and most of the external fat and tie it to a manageable shape and sous vide then finish at full blast in the oven. AT nearly 200$ I cannot risk anything less than perfection.

[Reds Fan 5]

Reverse sear is a given. We are renovating our kitchen and I think a sous vide is in our future. Good luck!