Trial and error finds _an_ optimal solution...
45 -> 48 = 3 x rin15
48 -> 49.6 = 1.6 x rin30
49.6 -> 51.31 = 1.71 x rin29
although there may be others.
45 -> 48 = 3 x rin15
48 -> 49.6 = 1.6 x rin30
49.6 -> 51.31 = 1.71 x rin29
although there may be others.