[Public-List] Rudder and cabin roof cross beam

[Taft Gerry]

RudderOn the hard, the tiller, rudder and keel all appear to be in alignment.  However once underway, in order to go straight, my tiller needs to be offset by about 7 degrees to starboard.  The tiller head was remanufactured last year, and this year I replaced the gudgeon, pintle and rudder shoe. It has a thru-bolt to the rudder shaft and an alignment bolt - no key way.  
I am thinking my rudder stock is twisted however that does not explain why everything appears to be in alignment until the boat is underway.
Cabin roof cross beamMy 1965 has a wood beam and it is deforming. I have no interest in replacing the beam.  
I am thinking about using a 4x4 and a bottle jack to support the beam as required. 

Any comments or suggestions would be most appreciated
Gerry TaftKia Ora #103