We also have a problem with bowed sides on an Elddis.It is an Avante 505 .We purchased from new in 2001 and noticed the first problems after about a year....front bed slats falling through,gaps behind kitchen cupboards.We took it back to the dealer and said Elddis had recognised this as a manufacturing fault and affected caravans were being returned to them for repair.After several months this was carried out and we were happy to have returned to us our fixed caravan until the following summer problems have again occured and the dealer have said it is the same problem.Elddis have agreed the repair but seem to be dragging their feet as they now do not want the caravan returned to them but to go to another service centre(our original dealer has since lost the contract with Elddis, and although they still accept responsibility they are also rather slow to act).So here we are over 2 years since the original fault was discovered and 7 months since the latest problems were reported,still with an unrepaired caravan,which the repairer now says he can't guarantee will stay fixed even after the next repair.We have now sought advice from the legal helpline attached to the caravan club,the advised us to write to all parties concerned quoting relevant parts of the sale of goods act.We have had slightly more interest shown however from our supplier who came out to take photo's of the defects ,however it would seem the most we can still expect is a repair.We did not pay for the caravan with finance so this route is not an option.Anyway good luck and if you have any more luck than us please advise in a posting.