SuperD,
I must respectfully disagree with you on the full side slides. They are causing a number of problems for various manufactures. If you think Thor has a better design and they don't have problems with the slides, you are sadly mistaken.
The three rail system still has problems. While we were at the factory to have problems fixed, which is another story, we met several owners who have ongoing and unsolved problems with full slides. If Thor is telling you they have the solution, I have some ocean front property in Nevada I will sell to you.
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