Forty-two kilometres of city, cut into a plate the size of a dinner plate. The whole course is on it - every street you turned down, the river you crossed twice, the park you were not expecting at mile 22.
The marathons routes are being built and photographed. Yours can still be made today from your own file — which is the same model, made for one person.
Upload the GPX from your watch, from Strava or from the organiser, and the engine builds a marathon model from your actual track. You see it before you pay.