Carey TeaRose posted:Ross don't got no stinkin' 42 switches. I'm working on limited real estate. Will try MTH
The switches do not have to exactly match the radius of the curve that you are using.
The Ross O72 switches have a 22.5° section of a curve. The USA O42 are 45° sectional curve. If you connect the track switch to switch it will work out. If not, you will have to cut a curve in half.
The length of the Thru on the switch (14.64") may not match the length of a straight section. You can do the same, create a cut track to fit the length of straight needed.
All engines like O72 switches. Listen to the comments of the experienced STD gauge runners. Use the Ross O72.