An update. After using the Park 10.3 for a couple of days, I'm pretty impressed. It's generally quite stable. As another poster mentioned, you just have to adjust the bike's orientation to keep the CG in the middle of the two legs the best you can, and the Park 360 degree locking mechanism works very well.. if you don't, it's not like the wind would blow it over, but a clumsy person could knock into it. With the rear wheel off, simply lower the front of the bike. You can even let the front wheel touch the ground if you want. There is one position I'd want a sand bag....having the bike's front almost vertical..to the sky, in order to scrub the underside of the bike. The bottom bracket gets disgustingly dirty with god knows what (mud, leaf debris, horse manure!) Another solution is just to remove the front wheel (or both wheels) and hoist the frame only. No stability issues then.

An observation about the Feedback Sports Pro Mechanic HD. The locking mechanism is actually harder to use with the bike in extreme positions. You have to crank that dial down hard, and you don't get much leverage. The Park has a nice articulating handle that you use to lock down the knob. The Feedback only has some fins. I'm pretty strong, and it was quite hard to lock down the Feedback with the bike vertical, even harder to unlock. In fact, it was VERY hard to unlock it. If you don't really tighten it up, the bike will sag...it won't hold. And that $500 stand is almost new! For more common conservative positions, the locking mechanism works ok.

I've decided I will use the Park outdoors to wash the bike. It's steel, but I can take measures to protect the inside of the frame. The stand is just a pleasure to use. Maybe I'll wash my bike more!

Framesaver? Fluid Film? A raincoat?