I am now in the final stages of completing a 4.2m x 3.6m timber  roll off roof observatory. I am  no carpenter and it has taken me a couple of years to build. The roof can be rolled manually on a good set of  existing V track and pulley wheels.  I would like to have the roof automated using the same track and wheels and I  have seen mention of electrical garage doors, gates etc being used for such a purpose.  Can anybody recommend such a set up that could be easily sourced and  installed by myself.  It would be much appreciated.

Eric