Yes, length of the toneboard will matter, havent played any with the width. I've used different tone channel depths with the same width, doesnt change the tone all that much, but does change the volume and amount of air required to make it quack. The angle and length of the angle itself matter most for sound (easiest way to change the tone, in my experience) and small adjustments can make big changes. With the LA style, you can test different lengths of toneboard without cutting anything, so if u find one you like, u can still make adjustments then revert back if u dont like the change. So if you find an angle that gives you a good tone, but it's too raspy, or low pitch, you can shorten it a little, maybe smooth it up that way, and get a little bit higher pitch, or adjust the angle, etcetcetc. I dont know if i couldve ever made a call quack if i would have tried to make an arkansas from scratch, because i dont know if i wouldve had the patience to keep trying after throwing a few away lmao. But now, knowing what i know, i will one day when i want to play around.
Dan