@BobbyD posted:It may be required to duplicate a full curved track section of that radius.
It does with O36 switches, they need the 1/4 curve to equal the whole curve (45 degree) piece. That's not the case but with O60 and O72 switches. Their curved side has the same 22.5 degree arc as their full curve counterparts. The 1-3/8" isolated sections are completely straight.