I found a couple of guys locally with the sawing capability that I need, and we practised together last year. I figure to use some of the wood from the top of the new tree, or unuseable knotted sections of trunk to hone our skills on. Then we can get to the good wood, and make the most of it. On sealing, the candle wax I used previously was pretty effective, especially when I double-dipped. But another woodman suggested using heavy, waterproof outdoor paint, to seal the ends. This sounds like a good idea, and probably easier than melting dozens of tealights on the BBQ in my garage.