No - ladders are going to be handled by the node system. There is a special ladder node, but its not used ATM. Its something I need to add later.
Yes - radius can be tricky at first. I have a cmd in the node drawing code tho that lets you see the node's radius for yourself, so you can see exactly how big/small you need it to be. A LOT of bot navigation problems can come from incorrect radius values, so its something to be aware of.
More info to come tomorrow, I really need to sleep now.
