Hi Brett,
usualy boats should be set up with a few mill of toe out, which brings them in line under load. the important part is the beam bolt holes are tight as this is where the movement starts.
Also rudder alignment is very important, they should be parralell when straight ahead. Check this with rudders locked down, measuring the centreline at the leading and trailing edges of the rudder blades.
There is quite a good tuning manual that covers alot of this stuff available from the Mossie assoc website, from The Shop.
Last edited by thricebitten; 08/23/13 07:58 PM.