Thanks guys!!!
Problem is I already have the siding in place, using 2 #5 switches which use up a lot of the space on the siding. If I could replace them with 1 lefthand and 1 righthand curved switches back to back it would free up some space.
The area I'm talking about is in the lower left corner of this diagram. The current siding track there is Atlas 40.5" sectional. Pulling out the 2 #5 switches and replacing them with 2 curved switches should do what I want without having to redesign the whole corner. Even if I have to rip up the entire siding it'll still give me a better result I believe.
Now that I look at the plan, the final result doesn't quite match it anyway but it's close enough for you guys to understand what I'm talking about (I hope!).