My advice on cheap parts is to remember that you don't have to order from MSC McMaster and 80/20. We were stuck in that track last year, wondering how we could lost weight and cost. For those 5 ft long wings you might have noticed we used some cheap conduit (sp? sorry, I don't have time to run Word). My advice is to take a trip to Lowes or something like that when you need ideas for parts. You can use so many different materials that they have there and they tend to be cheaper than ordering from these other companies.
P.S. If you get your stuff locally that also means that you can run out and get an extra one when you need it the day before shipping!
