Thank you, I know that "squeeze out." Real pain in the bottom. Shows me that I'd better make some robust wedges.
I have some crappy bulk wood blocks to fill in like your log!
In my picture, the wood block under the front of the pole has two copper pipe pegs inderneath.
There are multiple sets of holes so I can move that block.
The red strap clamp does help to stop project wood from jumping up.
I went to the auto wreckers and bought a scissor jack from a small car.
Laid on its side, it provides no end of horizontal clamping pressure.
But most times, the damn project buckles and pops up.
Especially when hit repeatedly with a mallet & gouge.