I have a question concerning the rudder hinges, specifically the bottom rudder hinge. Leonard shows that the bottom hinge bushing should have a 1/4" hole instead of 3/16" like the rest. Now when one bores the bushing out to 1/4" that doesn't leave much left over, only about 1/32" wall, which seems to me to be quite thin. Is that the way it is suppose to be or am I missing something? Thanks. Paul