Heya riders! I bought a new 50L Gearsack rack pack the other day & it came with these wierd shaped plastic panels to insert somewhere (inside the pack I assume!> to hold it's shape. One of them goes in the front of the bag...got that. A larger one on the 'floor' of the bag...got that one too! But I'm left over with another large 'floor' size panel & an odd slanting square shaped panel that don't seem to go anywhere??? Any ideas???