It appears to me from my web surfing that yoder loops only run around freezer doors. Is this true? If yes, this bottom mount unit in question has the freezer on the bottom along with the compressor, condenser, and evaporator. It seems that all the freon components are confined to the lower portion of the cabinet. Am I correct in thinking the top refrigerator cabinet is free of freon components. If I drill a hole through the upper cabinet I should not hit any components of the closed system???? What do the people with experience say?