I have a set of clamp on forks, which seemed like a reasonable shortcut since I rarely use forks. I wanted something easy to stow out of the way and not too expensive since they sit around 99.9% of the time.
For light stable loads they are fine. For heavier or larger loads that might rock sideways, they suck. They can turn easily, wiggle loose, and will sometimes slip off when I back out (bottom of the forks sticks down 2" or so and catches on ground). If I cared enough, I might try to build a cross link that ties the two forks together in an attempt to stabilize them. But in reality, if I ever start using forks more, I'd upgrade to a QA setup and get some real forks.
I think I paid about $150 for my clamp on forks. You get what you pay for! In retrospect, that would have been $150 better put towards a proper setup.
As far as wrecking the bucket, I did put little dents in the bucket on my
B2920 where the clamps attached (nothing major, but it did show that it can happen). On my
L3200, the loader hydraulics cut off long before the bucket metal even begins to get springy. I doubt they'd ever dent the bucket unless I ran into something with a good head of steam.