Need to replace the porch roof pillars as I've found rot damage.
Instead of just swapping to the same boring ones, I'd like to get this shape;
As if they've put the pillar in a lathe and just touched it up a bit. (disregard the collar) Do you think it's easy-peasy to modify regular ones to look like this, or should I try to find ready-made ones?
You can easily create the chamfers with a hand router. Buy simple square posts, so you can choose the depth of the chamfers and how far they should go, giving your personal touch to it all. I did the equivalent operation when we built a stair railing.
Yes, you do that with a 45-degree chamfer cutter, it turns out just like in your picture. You place some sort of stop where the chamfer should start and end, for example, a piece of wood. Then you simply follow the edge with the help of the cutting tool's bearing.
Here's how my post turned out with just a small chamfer. I also routed the upper horizontal grooves all around. It's fun to make your own post!