Get a tubing expander, you won't regret it, you may actually kick yourself for not getting one sooner!
I'd wait another month or so and track down a Hilmor compact tubing expander when they become available. http://hilmor.com/products/compact-swage-tool
Do you also radius bend your copper? If so what do you use to do so?
I bought a hydraswage years ago and it has paid for itself time and again. with that and a ratchet tubing bender I replaced a few reversing valves with fewer joints and looked better too. I want to at least LOOK like I know what I am doing even if I don't