I tried the search function and found a posting about the older railriders from Yakima. Sadly nobody every answered his question so I am reposting. Are the older yakima locking railriders the same as the current control towers? They look very similar. I know I still need landing pad #9 but they look like they both lock in to the pad. Theres a seller on CL here with a full set of locking railriders for very cheap. SHould I just buy some landing pads and see if the railriders lock into them?