Nice to see And read your progress what I noticed though is the variation in rough cleft sizes 4 1/2 inches for each cleft would be ideal but it's easier to say it than it s. To split. Them.
You're right. It took us a bit of practise to get the splitting consistent, and we were fairly conservative in sizing as we have to learn the sawing as well. Also the tree itself wasn't perfect, so there were a fair amount of branches and twigs to work around. You can see them on the outside, but in places where the tree has grown around the branch, it sometimes splits in such a way that the 'wedge' looks big at the top but is too skinny part way down.
So, there was a fair amount of wastage. 2nd time around would return even more clefts, but I reckon 40 from one tree is a decent initial return.