Stupid curved locomotive body. Those panels need to be held very firmly in place, even after many hours bathing in water to make them a little flexible.
Holding the things is a nightmare. In the end, I put the PVA glue (after trying Super 'phatic and even superglue) on and just sat holding the panel in place for half an hour while watching the TV. Eventually,
the glue did its thing and the panel stayed put. I still put a fillet in the back of the joint afterwards though.
One panel incorporated the windscreen and curve, but that didn't make it much easier. Another long bath (overnight) followed by bending around a pen while drying followed by lots of clamps sort of did the job. I'll admit I seriously considered swapping wood for plastic.
Are there any special clamps out there I'm not aware of?