Try to get winnebago to pay for this as a replacement:
https://vroomslidesystems.com
It would be closer for you at least and they are super nice and responsive. They've added a small dealer network across the country in the last year so I think the negative of no one will know what it is is going away. They quoted $3500 to replace mine and winnebago paid almost $5000 to redo my schwintek so you may be able to sell them on it. Granted there is warranty to think of etc... but I won't be messing around with the schwintek again. If you could get winnebago to sign off on it then I think the warranty problem would be solved.
The screen door closed while I was moving the slide last weekend and I just about had a heart attack thinking the slide broke again. My new rule is no noise of any kind while the slide is moving...