Re: dripfree packing
Forget all that stuff.
Forget all the packing materials ,forget the fancy multi hundred dollar systems that you will not be able to repair when not at home.
Fill the stern tube with polypropolene grease by attaching a grease fitting to the stern tube inside the boat.
The packing and nut then is just insurance.
It will never leak a drop.
i know it works because i have done it to two of my boats, it is not a myth and not just a theory.
I love the smell of fresh cut plywood in the morning.