When I was researching this one of the points that jumped out at me was that the whole intent of "timesaver" was that is was a *PUZZLE* or a *GAME* and not a layout or layout element (which was what I was trying to make it). I decided I was trying to force it in where it didn't make sense and for the wrong reasons. I'm not saying that it is *WRONG* or you *SHOULDN'T* do it that way. Far from it! If it works for you, great! I decided to do mine on a couple of modules and see if I like it before doing anything permanent.
One big tip that is important is that the lengths of the sidings relate to the lengths and number of cars. If I remember right, having the sidings too long gives you too much room and makes the puzzle too easy. "Space" is supposed to be a major constraint.
Have fun and post pictures!
