Fred is being humble... he is THE expert!
That said, if I can help in any way since I'm not too far ahead of you on the learning curve, post here or send a pm and I'll share whatever I can. I posted my version of a "jig" in that tutorial section, that was made from spare parts in my shop. Not quite as foolproof or dead-on consistent as a hardened jig and milling machine, but has the advantage of allowing me to experiment with different toneboard cuts and tone channel depths and angles.
My most useful acquisition was an x-y table for my drill press, which allows very easy tonechannel shaping.