HI Scott! Thanks for buying one of the books. The .022" value came from some conversations with Gil Younger years ago and also from some of their previously published literature. I use it for the ones I build but you can most definitely vary from that when you alter the type and number of springs in the retainer.
I agree with you that .030" is pretty tight but there are some great suggestions on this string to help get it where you'd like it to be. One way is to use the thinner Altos (like Alto does in some of their Power Packs). Tom
