I've got a FULL SIZE stone bridge model! Actually they are rebuilding the old Wycombe stone bridge (looks a lot like yours, 3 arches, only not as neat.), I aughta take some pictures of the construction (they have it stripped down to just about the arches, with cribbing underneith right now). I guess you don't see one of these built (or rebuilt) every day. It was sorta collapsing into the creek. Nice model, too!