wheel problem

Dietmar and crew noticed an issue with the steel wheels of the GBO roof: some are not turning. Apparently it is stressing the motor. Reported the problem to Tony.

Someone somewhere found some photos of the wheel-rail configuration (before painting, centre-truck).

Tony is assembling a team to affect repair. He's invited me (and my 3 ton jack!). We'll need to jack the roof up to take the load off the wheels...