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 Glen I agree with Frank, "O" ring is the only way to go. I was 
forced to build a flat hatch for this 
year, due to budget problems and time. I did however use the O ring 
as described in the 
K350 plans. It has functioned flawlessly and not a drop of water. I 
have 7 different pods sealed  
with O rings and not a one of them has leaked. I might also add I 
have a 0.010" distortion in my 
mating surface due to welding and no problem. 
In a message dated 9/3/2009 10:55:35 A.M. Central Daylight Time, 
ShellyDalg@aol.com writes: 
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