Hi Matt,
At the risk of saying I told you so, dwb is right. You will be lucky to get a loco + 1 carriage up that incline.
I assume you are using Peco Setrack curves which, for the inner radius, are 228mm long. That means you are trying to climb 14cm over less than 1 metre of track which is a grade of 1 in 6.5. To raise the track by this amount you need a minimum of 6 metres. I would suggest you seriously reconsider your plans and maybe look at my earlier suggestions. While your idea of a mountain station is admirable you might like to think more in terms of a small hill rather than a mountain. Alternatively if you really want to raise the track by this much you will need to think about a helix.
Regards,
Expat.