SAGGING REAR END

Is one side (or even both!) of your Seven sagging at the rear? 

Close and frequent inspection did not show anything out of place and I finally came to the conclusion that the problem was with the nearside rear road spring. Having removed both nearside and offside springs, I still couldn't find a problem so decided to swop the springs left to right in the hope of getting the car level but, in removing the first U-bolt, I stripped the thread.
To replace the 'U' bolt means cutting a hole in the floor, but all was not lost. It soon became apparent that someone had been there before and reopening the hole was quite easy. Then I found the real trouble. The 'U' bolt was broken in two places (see picture). Fortunately I found a replacement 'U' bolt and the rest is history.
Vince Leek DA7C