Thanks for sharing your experience with mounting and dismounting a car body. Using the mounting holes under the rockers as a fixed point is a good idea, as it allows for consistent placement of the body on the chassis. The 1/4" behind the striker mount is also a useful reference point for ensuring that the body is in the correct position.
The use of body spreaders made from electrical PVC conduit is a great tip for anyone looking to make the process easier and more manageable. These spreaders can help to evenly distribute the weight of the body and prevent damage to the paint or body panels during the mounting or dismounting process.
It's also helpful to hear that with some practice, mounting and dismounting the body becomes easier, even with a painted finish. This can be reassuring for anyone who may be hesitant to attempt this process themselves.
Thanks again for sharing your insights and tips for mounting and dismounting a car body.