Welcome to BPNet, Matt and congratulations on acquiring Slider the BP. Sounds like things are going along well and it's great you have a vet visit coming up. If Slider defecates before that visit you can bag it in a couple of ziploc baggies, pop it in the fridge and take it along to have a fecal float done. Does your vet sex snakes? It's always cool to know exactly what you have.
Please feel free to ask any questions, post pictures, brag on your snake, just plain enjoy being around folks that won't think you are wierd because you are worried when your snake hasn't pooped lately or want to brag about the very nice shed it did (most everyone else will think you are nuts but we think that's just normal LOL).
If you haven't had a chance to read it over, here's our caresheet on Ball Pythons.
http://www.ball-pythons.net/modules....warticle&id=52