Have you seen these ?
https://www.ebay.co.uk/itm/Ducati-Mo...9iv:rk:11:pf:0
And yes, the cable tie method works like a dream, dunnit ?
Its just as good on the std, 3-spoke wheels too.
When you come to change tyres you'll be needing a bead breaker though.
I use and recommend the Abba one .. it works very well but isn't too bulky and is therefore easy to store.