I had a similar problem with suspect alignment; when I left for a trip last fall I could place my BAL deluxe locking tire chock between the curbside tandem wheels, when I arrived home the gap was too close for chock to fit. Crawled beneath rig took some pics and discussed with Lippert he spotted the flat springs right away (1 per side), don't know what I was looking at to miss it. Anyways rather than replacing with stock parts, I called a recommended spring shop in the area, over the phone we ordered a replacement and beefed them up with an added spring. I had them installed at another local shop that specializes in repairing semis, dumps and trailers a few weeks ago and now my spacing between the tandems is equal, total cost about $500. A side note here, (buyer beware) I contacted the Heartland RV dealer in the area (Fairmont, WV) in Oct and since I did not purchase our rig from them they stated they would call me back sometime in January!!! They have yet to call and I doubt I'll ever stop in, even if I'm in need toilet paper!