Got the bug to build my first bow and have started with a $10 piece of oak from lowes. I've been following the Backyard Bowyer and so far so good. It at least looks like the pictures! My first question is about backing. I'm thinking with a cheap piece of lumber, backing the bow is necessary. I've purchased a copperhead snakeshin backing for this and plan to glue later this week. My question is what do I need to be looking for in the stave to identify the top from the bottom given I've not started tillering? Does it even matter? Second question, how quickly should i exercise the bow during tillering? Ok, Let me have it!