I have a wallenstein thumb that I use quit often to pick up large rocks and to move and cut trees.
Yesterday I bent the thumb picking up pieces of cut granite blocks from an old foundation used to build a new retaining wall.
The thumb still works fine but doesn't close fully to accept the pin, this thumb is awesome, but has 5 holes for the pin to fit through, if one plate gets bent, it won't slide in.
Driving with heavy weight in the BH is safer if you balance it with weight in the FEL. This job I put 1 block(350#+) in the FEL, and 1 on the BH for each trip. DRIVE SLOW