The 7-limit using 3 and 5

3 and 5 are a possible pair of generators for ennealimmal, and tuning
them justly is a possible tuning. As a consequence, you get a {3,5}
version of the 7-limit which is wafso-just if I recall correctly what
that means. In place of 2, you would use (27/25)^9, and in the place
of 7, (3^17/5^11)^2. While ennealimmal is accurate enough that this
will work, it isn't a very good tuning, relatively speaking, and you
can do much better by using a tempered 3 and 5.