Not doing very well at all!
It doesn't seems the right shape, with too much fabric in some places (mainly in height at the back) and too little in others (length seems OK at the top, but way too short at the bottom) If I try to fix it like on the video, I would need to stretch it to be able to fix it all the way around the bottom. It then has lots of diagonal waves on the sides that make opening the windows difficult, and secondly the windows don't line up very well with the canvas windows.
I need to e-mail Nick with some pictures but I haven't had chance to make any decent ones yet due to the record amount of rain we've had for the past 3 weeks and my lack of time the very few moments that it wasn't raining!
I must also maybe point out that my Cali is in an underground car park and there is not enough room to raise the roof for drying if I get it wet.