Thanks Roy. I went with a 28 ounce tank. The 2.70 will run a solid 10 minutes at wide open throttle but I rarely open it up much more than 3/4. It'll take off at just over half throttle and is happy cruising around at that setting as well.

Here's a set of retracts for sale: http://www.rcuniverse.com/market/item.cfm?itemId=488937

You can also order them from Iron Bay.

You're really going to love how well this plane flies. It's one of my favorites.