Guys-Thanks for the informative replies. Sounds like 72" will be a good place to start. I guess I'm supposed to begin building it, because I was in Home Depot today, and right on top of the whitewood stud pile was a totally clear, straight grained piece, and then another one! Grain's pretty flat, rather than vertical, but that probably won't matter too much. Maybe I can build a quickie before this weekend's pool session. Thanks again! Steve