I'd like to make chili cheese burgers with the Stufz burger maker. Should I use velveeta, block cheddar or shredded cheddar inside the burger? I am going with store bought chili with no meat added for the inside and cover with more chili and cheese (I'll probably use shredded for this part) over the bun and burger. I'd like to do a trial run Tuesday or Wednesday for the upcoming weekend when I am making these for my family. Any ideas will be appreciated.