It appears that as long as there is no cross bar, in front of the crossover point of the lid, sticking brush would fall out easy or could be dislodged by back dragging.
Xfaxman, I like the way each of you tines has a matching lid tine.
A grapple like yours, about 50-54" with the tines 6-7" apart, a full lid with matching tines, and opening at least 45" or more - that would be my ideal grapple.
Sounds like your about ready to give blueriver a call. He does good work.