On my last terr. I did a three door front and let the front track hang over enough to let the front pane slip past the front of the terrarium on either side, there is a short door on the left and right on the inside track, then a larger one on the front track that stays to the middle, this works very well for the longer terrariums ,as its easy to get at any point just by moving one door, ill add a pic here if you like swords. Can you add a pic so we can see how your door opens on these cool vivariums? And nice job by the way.
very soon grasshopper you"ll find yourself in one of your own enclosures , looking out at all the critters and plants, They will be taking care of you, and all will be right with the world