I want to replace the rubber/vinyl seal on the lower section of a 16ft steel
garage door, it appears that the seal has to slide into a track/grove.

I do think that the door has to be clamped shut, then the lower section
bracket loosened so that section, can be slanted to a position that would
make it easier to work with the seal.

Has anyone done this and have any tips on how to make this as simple as
possible, for a do it yourselfer?

Thanks

Tom