I'm so fed you with airlines (the budget ones) charging the amount of the third world debt to put a suitcase in the hold I have made a hand luggage flight bag to the meanest of the specifications (Ryanair) so it is lightweight and I can get a lot of clobber in for my 10 kilos!
Someone gave me the outer fabric, the webbing straps were off an old shopping bag, I bought the zip for something in the dim and distant past when Big Ben was just a wrist watch and found the lining in my stash - all I bought were the plastic feet £1.55. I did however use a third of a pot of Fabritac sticking the interior base in 'cos I was too lazy to and stitch it.
Appearing at an airport near you soon!