I'm still using chips that I already had for now but I'll probably be buying chunks when these run out. Where do you find chunks of something other than hickory or mesquite? Academy Sports has some pecan but they're bigger than chunks and wouldn't fit in the MES loader. Also do you use charcoal to help with smoke ring formation? If so are you using lumps or briqs? Does the brand matter since we're not using the charcoal for fuel?