heh, trashcans can do anything, I bought 2 yesterday to stary playing with. I wouldnt use metal strips because even if you could get them to the right angle to fit, they will bend easily nad that could comprimise the integrity of the kneepad. You want something rigid. Id wait until you found some sort of heat adjustable plastic before fixing them just for the sake of doing it right, or you could do as I did for my brother, which is just attachach all 3 peices to the elastic chord that straps them to your knees so they stay flexible and break free. BUt then again, he is in college, where being drunk in it is a very real possibility, so yourcall really.