I don't know what's going on here. The cab sides of the 1361 overlap the front by over a mm. The black areas had to be removed and the rest blended into the saddle tank. Even the GWR didn't rivet into thin air !
It wouldn't be so bad if the cab wasn't a touch short anyway. Ideally I'd shorted the tank but that would be a lot of work and lose some nice rivet detail.