I used the spare shock cord to make an indoor clothes line the full length of the troll.
Make the loops to fit over the roof latches and secure with small zip ties, ok for tea towels
or smalls. Makes good strong elastics to keep awning poles up together, just overlap the
ends a couple of inches and zip tie lots of other uses for the gash bits as well.

I found it best to tension the cord with the pop top down to ensure the canvas pulled inwards effectively.

I had no shock cord in mine at all, and the fabric has gone mouldy, so it seems as if it is needed. I managed to thread new cord through today using a wire tie (bendy but rigid enough to push through) with a piece of slippery string tied to that, then the shock cord looped through the string. I pushed the lot through the holes one at a time with the blunt end of a knitting needle (the woman's touch!) It was fiddly as the wire ties kept sticking in the hem instead of coming out the other end, but it worked okay. It took about 30 minutes for the whole job. It is easier to thread things round corners when the roof is almost down - that way you can straighten the corners a bit, and you can still just reach from the inside through the zips.

Now I've got to attack the mouldy canvas - hoping I can brighten it up a bit and remove the unpleasant odour. I have to say the whole thing is very grey, and makes the Tardis a bit dark inside. I would quite like to replace the canvas with new cream canvas, but I think this is probably quite a tricky job involving more than my DIY abilities. We'll live with it for now.

Finally took the plunge and just replaced my roof 'shock cord' - after having got away with shortening it by knotting a large loop in it and hiding it inside one of the corner 'tubes' got away with it for more than a year ! but finally became useless !

Took Aaron's advice, 4.0mm from 'Bouncing Rabit' - same price as last year and super 2 day delivery included :)

Took me a bit longer than Aaron's 15 mins , because I left the original in situ (for fear of having difficulty with the new cord) and inserted the new through the corners by attacking the end, with PVC tape to a fairly rigid short 4mm plastic tubing, which easily threaded around the corners !

Tightened and removed the old cord . Very pleased with the result. I'm sure that the easiest way would have been, as Aaron said, to just pull the new cord through, using the old, but I was a little cautious and choose a method with a 'back- up'

does ' bouncing rabbit' show up on card statement??

OOOH ! I hope not !

Can I offer the ideal threader, if your cord has, like the one on our original Puck, snapped and vanished! I used a fly rod, with the new shock cord tied to the tip ring, and the whole deployed so the tip ring faces toward the inside of the van - it goes around the corners a treat

We are away in the Cotswolds and after setting up, we were relaxing with a cuppa and heard a twang. I had a look around but didn't notice anything.
As I was walking back to the van, I noticed the roof cord was bunched up at one corner. So just purchased the 4mm from bouncing rabbit.
It's now £10. We are going to replace the cord that holds the net curtains back, so I've also ordered some 3 mm for that. All in, £16. Thanks for the link

I suppose its handy to have some cord at hand just in case it's needed I have a Eriba troll you've mentioned 4mm thickness but what was the length you ordered from bouncing rabbit . Many thanks Phil.

I've ordered 10 m, I know it's to much, but I thought it would be easier to fit through the corner loops, then I can tension it.
Our van is 20 years old next year, so it's done well

Thanks for the info . Mi

Thanks for the info. Our 540 is 9 yrs old but I still think I'll order some it's always handy to have . Cheers Phil.

I find that a Fisherman’s knot works very well as it is simple and can be tightened easily if the shock cord stretches…

https://m.youtube.com/watch?v=77lQEeuJDP0

There is also a good Wikipedia page but for some reason the link gets corrupted when I try and paste it into this thread

Handy knot to know, thanks.