Yeh Mel, the big post on the corners, braced by a diagonal stay to strain the fence to. The one I put in was 330mm diam. about 13inches in your language. This one I cut from a fallen tree, it is stringy bark, not the best but I put a metal cap on it to hopefully extend its life. Ironbark is the best but we don't have any this side of town. Lately I have been shying away from timber posts as they are too heavey, I have been using steel. Now I have my tractor with a good loader, it makes easy work of it. The old post came straight out, I just had to widen the hole a bit and then I was able to drop the new post straight in. I might start cutting some more posts. I don't think you have a lot of the hardwoods that we have, most of it is a bit rough, plenty of splinters. Your timber always looks so nice, light and uniform. Fortunately for building now we have a lot of plantation timber, the hardwood hardly gets used anymore.
With regards selling your calves early, you just have to weigh it up and do what is best. I know some people here that sell their calves at 240kg, they get the best /Kg at that weight and their land is not suitable to take them any further and they don't lose out on much and it eases the pressure on the land and the cows. This year I will have a few cows to sell and I might unload their calves just after Xmas and send them along a couple of weeks later, hopefully PTIC. (preg tested in calf). The calves should be around 200kg and bring reasonable money.
I took some photos of my first calf today, so far he is the only one. I reckon he is about 2 wks early. He is a really bright little fellow, his mother will small, she will be one of the cows that I will be unloading, very good cow though. The calf is very social, he gets around to all the cows, the heifers are very interested in him.
Here is a photo of one of my cows, she was my first registered calf and has had two terrific calves herself now. She is not anything to look at but she does the job. Her first calf is one of the bulls I am selling and when I weighed him the other day he had taken over the lead at 870Kg.
Ken