Hello everyone . I am new to this site , so excuse me if this question is in the wrong place. I have just purchased a Tormek T 8 a big jump from a Lansky, so I have just started sharpening knives with the T8 and read about the Kenjig to set the support bar accurately for a 30* bevel . does anyone know what length one would have to be for a 20* bevel . that is with a 250 sanding wheel and also for a new leather polishing wheel . May i just say what a great site the Tormek community is especially for an old technology Dinasaur such as me . I hope someone can help with my question thank you ine anticipation. PAUL.