The Trackwatch page in the April Modern Railways has a description of the branch. For example the single lead from Thornton North Junction is 60 chains long. Despite the closure of foot crossings towards the western end, and the construction of a farm underpass, one user-worked crossing remains. Approaching Leven station there are of course a pair of crossovers. The text says the trailing crossover is to the west of the facing one but the accompanying diagram shows them the other way round. On the basis of photographs I've seen, I think the text is correct.