Before you buy, check the angle at which the stall doors abut. This is one of the key factors in determining how far the RH must be placed from the TT to get the stall tracks to enter on a straight line. I have included an address to another RH-TT placement discussion here on the forum which might help.
https://ogrforum.ogaugerr.com/...sign-part-two?page=3
Chuck