so, obviously i'd need to get a long front fork, but i *think* there's enough room in the rear dropout of my old mongoose frame to accommodate a 24" wheel... that is, if i really push things and mount the wheel as far back in the dropout as it'll go, with not a whole lot of room to spare within the chainstay bridges...

my question is - anyone done this? is it within the realm of possibility?
any reason NOT to do this? i.e. "hey guy, a 20" frame wasn't meant to withstand the forces of 24" wheels", etc.