The first bucket I made was too big and although the front lift on double purchase had no problems lifting the load, the front weight was too heavy for the king pins which bent after going over some bumpy ground.
In use, you can dig with this bucket or drive it into a mound of dirt and operate the lift to tilt it backwards. To tip, you release the latch. When you lower the bucket to the ground, the latch clicks shut again.
I will tidy up my sketches and do some close ups of relevant features as soon as I can.
In the meantime, some other info'. The bucket size is 32"wide, 14" high and 12" deep. The frame fits on to the front implement bracket just like the dozer blade. The angle of the frame is arranged to allow the bottom of the bucket to be flat on the ground in the lowered position. The bucket swivels on brackets welded to the bottom of the frame. The frame has forked ends to fit the tractor mounting and is 23" long from forks to bucket. The spring loaded latch is pretty simple and easy to release but is better described with a sketch and a picture. I am quite certain that you guys/gals will come up with some great improvements. Out here I have tended to relax into the laid back style of "if it ain't broke then don't fix it"!!