Bruce In Bangkok fired this volley in
:

You could equally well cut a slot in the rudder blade to accept the
rudder stock which can be done easily with a cutting torch, a plasma
cutter or a 4 inch grinder. You will probably have to tack the upper
and lower rudder stock to a piece of angle or pipe to hold them in
alignment before you weld them to the blade, but you'd probably have
to do that anyway.


I'd envision the job as a hybrid of the two: mill slots in the shaft
only about 1/4" deep. Cut a matching slot in the rudder. Slide the
two together (self-aligning), then weld.

LLoyd