This is kinda like a hook? Well, in MRT we have poles to hold onto in case we fall right? So maybe we can attach a proper fit for the poles so we can like move it up and down and it has a good grip on the pole so it can support the weight of the bag? It's actually meant for hooking the bag onto it so it supports the bag weight as I have to travel a long distance to get to school and it hurts the back. So yeah, for shorter people maybe they can hang it high over their heads so more people can get on? And well, if you wanna still carry your bag, it's ok, just gotta make the hook a bit higher to support weight =) It's not a good design or much of a solution but still trying =( I'm unfamiliar with Sketch Up. You can put your bag on the floor too, but like, it's a bit rude? Yeah, ah wells.