gearbox oil leak over slides

[Cook-Den]

Hey everyone, we have a 2018 305RL with 3 slides. The gear box above all 3 slides leaked oil onto the rubber membrane causing it to blister about the size of a 50-cent piece, one of my concerns is that the blister catches and rips open when slides are open and closed, the other concern is why is gearbox leaking and if it runs out of oil will continued use of gear box destroy it. Unit is still under 1 year factory warranty. Here is what Keystone service rep. told me they would do. 1- Put a drip tray under gearbox to catch excess oil because it was overfilled at the factory. (I want the gear boxes replaced) 2- Cut out the effected area blistered by the oil and patch it. (I want the rubber over the entire slide replaced) Keystone was adamant that this is all they are prepared to do. Warranty is up Feb. 2019 and that is all the longer they will stand behind this issue. What has been anyone else experience as I am sure this happens frequently. Thanks in advance for feedback