Anyone done a shock upgrade on thier 397TH and if so did the sewer pipe for the rear bath get in the way using the Roadmaster kit ? I could probably just add some 22 Deg ells to get a few more inches of clearance but really don't want to do that. The Lippert installs on the outside of the frame but I have used that kit on another 5er and didn't see much improvement but it did give some.