hello all, I have recently begun building the above layout for my grandson but I can't get the curves correct with the Setrack parts that are listed.
Has anyone else tried this layout, I am talking about actually building it, not in Anyrail, although I have done it in anyrail ok.

I have to replace 2 ST-15 on the right hand side outer loop with 2 ST-17 & replace 2 ST-15 on the left hand side outer loop(not the branch line curve) with 2 ST-17.

any replies welcome & thanks in advance
Alan