Upon pulling a decent sized stump yesterday, I feared that it might be a little heavy for the 2520 to be able to lift out of the hole using the forks. So, I rolled it up on its side to get access at the root mass. Then, I took the fork tines off leaving just the frame attached to the tractor.
What this gets you is the lightest possible attachment, but still with the integrity that your loader needs, to perform work. For example, the 49 bucket weighs around 180 lbs and they only get heavier from there. An Artillian fork set with the standard 42" forks weighs just under 200 lbs. The fork frame alone weighs only 73 lbs, over 100 lbs less than the smallest bucket that JD makes. What this means is that your tractor gains over 100 lbs of lift capacity!
As long as you have the ability to chain, strap , or otherwise attach an object to the frame, you have the ability to move even heavier objects than otherwise possible with your JD loader.
(Please note that the fork frames now have chain slots for just this purpose but my own frame (yes, the original is still in use) has the old low grade rails which did not have chain slots.)