I am in the process of building the rudder steering assembly from Nick's book. I am unsure what wood (or other...) to use for the sliding track assembly. I suspect that soft wood like cedar or redwood will wear too quickly. I have some oak, nut experience with oak and epoxy did not live up to the longevity test. I have some teak, but it is oily and I dont think that will work. I have some apple. And probably some maple. I also am wondering if some 1" x 1/4" aluminum angle wouldnt be better, if its available. Has anyone else built and used this and can offer comments?