We have just replaced our 290 for a 340, well it's on order, we changed from a 310 to a 410 earlier this year.
Our 290 will thus be up for disposal. It's a 2017 model and the left hand side panel has been made removable by a local canvas specialist. It has only been used about half a dozen times, we usually use a caravanstore. An Eriba strip is available too.