I have looked around here and can't seem to find an answer to this nagging question. If I missed it apologies.

As a rule of thumb a structural ridge line should be 83 percent of the hammock length. Two parter:

I presume the length we are talking about is the hammock length as it it were flat on the floor?

Suppose this rule of thumb doesn't work. Does increasing or decreasing the ridgeline length increase sag, an by extension flatness of lay?

Much obliged in advance.