On 22/11/2019 20:14, John wrote:
Want to remove chair from rail to relocate. Understand how to remove
balance
of equipment.. Also have installation manual not very helpful. Seems
manufacture designed that way.

Not sure what my model was but I think they are all similar, there are
mechanical stops that have to be removed at the top or the bottom,
depending on which is more convenient. You need to use the hand wind
once the electrics is disconnected, this is very slow indeed. It's not
too difficult to make up an adaptor to fit into a cordless drill.

IMHO they are designed to be difficult to DIY (e.g. for replacing
batteries).