... answer for 00-SF at the scale track spacing (44.67mm) is 1:3.86 crossing angle curviform. I used a GWR curved 9ft switch to get the best fit. The radius is just under 36". The TDV makes it very easy to do this -- here are some screenshots to explain. I started with tools> make return curve for each A-5 turnout. I'm sorry I have to go out now so I don't have time to write in detail. I will write again tomorrow. 2_051431_550000000.png 2_051431_550000001.png 2_051431_560000002.png regards, Martin. posted: 5 Aug 2011 20:21 from: Hayfield Martin Thanks I will try that as it might answer my question, sorry I did not explain my self clearly. Here is another go If I convert an A5 turnout to a Y turnout does the crossing angle of the Y become 1 in 10 for each road. If so could I use an A4 or A3.5 crossing so that the crossing angle of the Y turnout decreases to a 1 in 8 or 1 in 7 so that the ...