I have tried the suspended gralloch. For me it doesn’t work. All of the weight of gut contents pressing against the belly skin makes it much more difficult to open.
Instead, small slit in the throat - tie of the oesophagus and separate it and the wind pipe. Lie beast on its back, lift up belly skin away from rumen, open up the belly from sternum, roll it onto right hand side with head to your left, ease out the rumen, separating the liver, get the neck of the rumen and ease out the food pipe, pull rumen and intestines out, at back end squeeze out pellets, chop and tie off off poo pipe ( or faff about cutting out the rectum , bladder etc - I do it in the larder when splitting H Bone), slit open the diaphragm, reach in - being careful of any sharp bone and grab wind pipe and extract, lay beast so any blood drains out, dispose of the gralloch, clean up knife and hands using wet grass, moss, stream etc, have a smoke and drag or carry beast back to the larder.
Meanwhile suspended method - first unfankle all the knotted cordage………………,
I have also found the solution to gralloching and extraction - its called a keen nephew, godson, daughter’s boyfriend or somebody else who is keen to learn. You can guide them through the gralloch and then let them get fit recovering the deer - far too dangerous dragging and carrying an unloaded rifle and since they don’t have an FAC and its the law that a younger person does the dragging - well I will see you back the yard.