Dear reader, Someone gave me an old crockpot Model C3150/2 without manual. I really would like to use it, but the old lady who gave it to me never used it herself so she couldn't help me with my questions as: Do I have to put water between the metal and the stone pot and if I have to pre-heat is just like an oven etc. Does anyone still have the manual for this type of crock-pot? Thank you very much!!! Hanriette Ruigt Oude Varkenmarkt 24 2311VR LEIDEN The Netherlands j.m.a.ruigt@hhs.nl