As an update... The roof bungee has been loosened off very slightly, I can easily get my hand underneath it on the corners, and I've made sure the excess is wrapped around the tensioned bit at the back, so it doesn’t foul the roof seal. Thanks for all the advice everyone
The internal topper was pretty straightforward to fit. It was fairly cold when I fitted it but with the auxiliary heater on it was fine! I really noticed how the temperature ‘up-top’ improved once it was in place.
The instructions that came with it are very comprehensive, and easy to follow. I would however suggest you watch the youtube video a couple of times, as that makes it a lot clearer. If you’re a fairly practical person you will find it easy to fit, you just need to take your time to ensure a good fit. Take your time around the corners, and cut the velcro into small squares to go around the corners.
The only thing I struggled with was sticking the velcro on the shiny paint at the front of the roof opening, (I just didn’t want to stick anything on my nice new shiny paint!!) however, once its all in it looks very professional.
You do also need to wipe the surfaces clean before you stick the velcro down, the is a residue on the surfaces from the factory, which will prevent the velcro sticking.
Also, take care when you close the roof for the first time. I had followed the instructions and not zipped up the front opening above the front seats, so as to allow for air flow when closing. I rolled the flap up and used the velcro to secure it, but I think that made it too bunched up when I closed the roof. When the roof was shut it wasn’t closed properly above the drivers door (had a mild panic at that point) but I opened it again, un-rolled the flap and just folded it in the space. The roof then closed properly and looked fine, phew!
It does seem a bit loose on the sides, but that may just need a bit of fiddling and adjustment over time. We are going away for the night this weekend, so I shall report back on how we found it!