door top distortion

[Graham Clarke <gemin@cix.compulink.co.uk>]

Adjustment of the shoot bolt holes certainly enables the sides of the 
doors to be pulled flush, but I have both tops bowing upwards about 1/8"
between the hinges. A solution could be to separate the hinges more, but 
that means remoulding the recesses. Building up the top is clearly 
undesirable. Could heating under pressure work ? Any other ideas ?

gemin