Last week I was able to put everything together, the trusses were sagging a bit, and the ones on top of the OTA were pulling out of the blocks at the top, which made everything come out of place and flop down. So dad suggested shock cord and that worked perfectly - it doesn't sag a bit.
We didn't know what to hook them onto at the top but after looking around at bunnings we found these:
https://www.bunnings.com.au/hangman-...-pack_p3961739
I had to cut them shorter but they work great.
By the way, motion is perfectly - even 'buttery' - smooth in both axes.
