Have you sprayed the awning rail and Magnum cord with silicon spray to ease its movement? You can also get extension pullers eg https://www.spares2you.co.uk/ease-i...YyEUphWJkDaY3HwiQszM4_Q7UC54Mp4YaAgPyEALw_wcB
I find laying out the Magnum in line first helps with the initial lifting onto the awning rail. Arthritis doesn’t help!
We use the Thetford silicone spray for awning rail. Nowhere on the Magnum to use the puller and not keen to stitch on a tag..