Gunrunner John is right. Unless you're going for an authentic postwar look, keep saving your money and use Ross track instead of Lionel O22s. The Ross switches are much smoother and less derailment-prone. (Plus they have a wider variety of track pieces to make virtually any layout.)
With back-to-back Lionel switches, it might happen that both of a loco's pick-up rollers end up on a gap at the same time, which would cause the train to stall or shift into neutral. That's easily solved by adding a roller on one truck of the tender, and a high-current tether to connect it to the locomotive. If in doubt, try the track configuration on a level floor first to make sure the loco can go through it without issues, before building it into a permanent layout.