I have both front and rear Harris stands and whilst a lot of people swear by them and I admit they are well made stainless items, they are a bit "iffy" with my 2003 749S.
The rear one I use mainly for cleaning/lubing/tyre warmers (occassiaonlly) and so I replaced the cups with a steel rod with a handle welded across the end of it (T shaped thing). That goes right through the rear spindle and is then rock solid. I have used the cups sometimes when I need to get the rear wheel out, but they really don't sit very well on the double sided swing arm. Why oh why did Ducati not put threaded holes for bobbins on it!
The front one is quite wide, so the swinging hook thingies are right out at their maximum extent to reach the forks. I didn't used to like using it at all, but now I've done some track days with tyre warmers on I have got used to it and it's "ok". I recently took the front wehel out myself to have a new tyre fitted and left it on the front stand over night (well, both stands of course) - it was fine and steady.
Sorry about the rambling ....