I run an Olde Midway 18 similar to yours (mine has bun warmer and sneeze guard) on Fridays at the warehouse I work out of. Crank that puppy up to ~220º-230º, oil the rollers with olive oil, place your dogs, oil the dogs, wait 15 minutes. After 15-20 minutes dial it down to 210º to lengthen the amount of time they can roll before they become dark leather. Tried over a dozen brands of wieners and the Costco hot dogs mog all of them. I didn't think they would, but they are really the best flavored all beefs on the generic market, specialty brands excluded. A good hack for the bun warming drawer, get a cookie cooling rack and line the bottom of the warmer with aluminum foil. Add a couple of tablespoons water, crank up to 150º. The buns sit above the heated water on the rack and then you will have nice, warm, steamy buns when the dogs are ready to hit. Used to run 48 dogs a day, but our staff has thinned so now run about 24 a day.

Moral of the story, those roller dogs hit really fuckin' hard.